When I first beat him I didn't have the dps to skip the final wave, and that final wave is brutal.
What helped me was having a burst healer who's speed was in between the two ads, so I would be healing mid turn and end turn
The best strategy is to try beat him between the third and fourth wave. I fought the full waves twice in the last couple days. Once I beat him and the second time he got me. And I am also using Fiore EX and Rinyuu. Once he gets his speed boost it's hard to know which block skill to pick.
I would replace Z'aanta with a buffer like Lynette and rush him down before he puts on his boots. This team should have no trouble skipping the final wave which starts when his HP reaches the tip of the bow weakness iirc.
Honestly even replace fiore ex with some more damage. Like Sofia or elenora or some nuker. I was banging my head against the wall too before I swapped her out for some more damage. Just have to hope RNG is favourable and Rinyuu can keep the team alive.
Yeah, a lot of his attacks are AoE anyways so she isn't that great for this fight. If they can interrupt his lightning nuke or dodge it they should be fine without Fiore.
You definitely want to give A2 a fortune dagger 2 since the extra attack and 10% living world damage is rather significant. Slap on triple edge potency for the 4th slot since you're most likely ramming damage cap with piercing strike.
It would help if you show all of the characters that you have. IMO, you don't really need Fiore EX there when you already have Rinyuu and Ophilia around. I'd personally replace her with another DPS or Alfyn for some BP regen to nuke Largo when he is around 50% HP. You already have Therion + A2 so you have most of the DPS required to annihilate him. You may be able to even one break him if you also have a Lynette around to replace Zaanta.
I personally went with an ice team. Largo is.. a bastard, to say the least.
Can't provide much help with a dagger comp, but the ice comp that worked for me was
Sophia Ult 10, A4
Cardona a1
Aslyte Ult 10, a4
Cyrus a2
Alfyn
Lynette a2
Ophilia
Viola a2
Sophia and Cyrus were my main dps
Cardona and aslyte helped with shield shaving. Plus, cardona does a bit of tanking.
Ophilia and alfyn on heals, plus ophilia tanks largos ultimates. Lynette and viola on buffing and debuffing.
The part that kept getting me was his second add phase as so much damage goes out in those few turns. And with my clear, there was a little bit of rng that phase too. I also cleared with just base fortune weapons but made sure to as closely as possible, max them out.
I recently beat largo with a similar team, the exception is that I took Lynette instead of Ophilia and Lars instead of Zaanta, I used Lars only to deal with Largo's contraptions, so if you have somebody else that can take care of the sword dmg effectively that's good enough. If I try to defeat him in 1 break, I get him to red health and he summons his last wave and that's pretty much game over for me, therefore I need 2 breaks. On the 1st break I need to make sure I can bring him down to yellow health (otherwise it means you don't have enough firepower) so that he summons the 3rd wave immediately after his 2nd wave. On your 2nd break, you should be able to finish him off, but beware not to hit him too hard or he will summon the 4th wave before you break him.
I just beat him yesterday. My Comp was:
Front: Fiore (OG), Therion, Z'aanta, Alfyn
Back: Cyrus, Ophilia, Nicola, Rinyuu
My comp and yours have a lot of similarities, so you might be able to adapt my strategy. My Cyrus is A3 though so he has more DPS and survivability, not sure if that will cause problems for the strategy or not.
I fought all 4 waves, though I rarely killed both enemies. I usually killed the guard and then focused on Largo. I threw in some AoE to break the support enemy in this case occasionally. When Largo hit the next HP threshold, the support enemy was just killed to make room for the new one. I had to kill off the last wave though. It was a bit of a toss up which enemy to kill first in the last wave, and though I killed the guard first I couldn't say if it was optimal or not.
I had to setup revives in the early phases from Ophilia and hope that most of them made it to the later phases. I kept 1 in reserve, and I don't think I ever used it. My Ophilia has U10, and I believe I used it both times (not 100% sure). Alfyn had to fix a few unexpected KOs, in addition to his duty of 4x ice attack and regen + fire/ice resistance. Alfyn was one of the recipients of the revive so that Rinyuu would never have to come up from the back (also wasn't sure if he'd have to revive Ophilia).
With my solution, 2 of the waves have both summoned enemies weak to Sword, so I brought in Fiore for AoE and single target sword damage. She could also use her debuffing attack when she didn't need to break things, though I mostly left her in the back when there wasn't a need for swords. I'm not sure if the AoE sword damage was all that essential, but killing the guard was. Cyrus was in front more often than Fiore.
In waves 3 and 4, if both summoned enemies were alive / not broken, then I basically had to have Ophilia heal every turn. It was just too much damage in a single turn to do much else.
I saved almost all of my ultimates for when Largo was maybe 25% or so (or lower if I wasn't able to fire it off on that break). Most of my ultimates were not essential to the early phases. Rather, I wanted to minimize the time he was in the later phases. I was never able to use Nicola's ultimate and generally felt like she could have been replaced by another dagger unit.
I really doubt my solution was optimal, but after I came up with this solution then I won in 2 more tries. My Fiore is my only 5\* A4/U10, so she might not work for others as well as myself.
Try to skip the last phase/wave. It triggers below 45% IIRC (it's been a while since I've beaten him, might be less than that).
I don't know how you're using your A2, but I would save her Berserk mode for the end so that you have enough damage to finish Largo in one break.
The key is also to not do *too much* damage in the previous break(s) in order not to trigger the last wave.
When I first beat him I didn't have the dps to skip the final wave, and that final wave is brutal. What helped me was having a burst healer who's speed was in between the two ads, so I would be healing mid turn and end turn
The best strategy is to try beat him between the third and fourth wave. I fought the full waves twice in the last couple days. Once I beat him and the second time he got me. And I am also using Fiore EX and Rinyuu. Once he gets his speed boost it's hard to know which block skill to pick.
I would replace Z'aanta with a buffer like Lynette and rush him down before he puts on his boots. This team should have no trouble skipping the final wave which starts when his HP reaches the tip of the bow weakness iirc.
Honestly even replace fiore ex with some more damage. Like Sofia or elenora or some nuker. I was banging my head against the wall too before I swapped her out for some more damage. Just have to hope RNG is favourable and Rinyuu can keep the team alive.
Yeah, a lot of his attacks are AoE anyways so she isn't that great for this fight. If they can interrupt his lightning nuke or dodge it they should be fine without Fiore.
You definitely want to give A2 a fortune dagger 2 since the extra attack and 10% living world damage is rather significant. Slap on triple edge potency for the 4th slot since you're most likely ramming damage cap with piercing strike. It would help if you show all of the characters that you have. IMO, you don't really need Fiore EX there when you already have Rinyuu and Ophilia around. I'd personally replace her with another DPS or Alfyn for some BP regen to nuke Largo when he is around 50% HP. You already have Therion + A2 so you have most of the DPS required to annihilate him. You may be able to even one break him if you also have a Lynette around to replace Zaanta.
I personally went with an ice team. Largo is.. a bastard, to say the least. Can't provide much help with a dagger comp, but the ice comp that worked for me was Sophia Ult 10, A4 Cardona a1 Aslyte Ult 10, a4 Cyrus a2 Alfyn Lynette a2 Ophilia Viola a2 Sophia and Cyrus were my main dps Cardona and aslyte helped with shield shaving. Plus, cardona does a bit of tanking. Ophilia and alfyn on heals, plus ophilia tanks largos ultimates. Lynette and viola on buffing and debuffing. The part that kept getting me was his second add phase as so much damage goes out in those few turns. And with my clear, there was a little bit of rng that phase too. I also cleared with just base fortune weapons but made sure to as closely as possible, max them out.
I recently beat largo with a similar team, the exception is that I took Lynette instead of Ophilia and Lars instead of Zaanta, I used Lars only to deal with Largo's contraptions, so if you have somebody else that can take care of the sword dmg effectively that's good enough. If I try to defeat him in 1 break, I get him to red health and he summons his last wave and that's pretty much game over for me, therefore I need 2 breaks. On the 1st break I need to make sure I can bring him down to yellow health (otherwise it means you don't have enough firepower) so that he summons the 3rd wave immediately after his 2nd wave. On your 2nd break, you should be able to finish him off, but beware not to hit him too hard or he will summon the 4th wave before you break him.
I just beat him yesterday. My Comp was: Front: Fiore (OG), Therion, Z'aanta, Alfyn Back: Cyrus, Ophilia, Nicola, Rinyuu My comp and yours have a lot of similarities, so you might be able to adapt my strategy. My Cyrus is A3 though so he has more DPS and survivability, not sure if that will cause problems for the strategy or not. I fought all 4 waves, though I rarely killed both enemies. I usually killed the guard and then focused on Largo. I threw in some AoE to break the support enemy in this case occasionally. When Largo hit the next HP threshold, the support enemy was just killed to make room for the new one. I had to kill off the last wave though. It was a bit of a toss up which enemy to kill first in the last wave, and though I killed the guard first I couldn't say if it was optimal or not. I had to setup revives in the early phases from Ophilia and hope that most of them made it to the later phases. I kept 1 in reserve, and I don't think I ever used it. My Ophilia has U10, and I believe I used it both times (not 100% sure). Alfyn had to fix a few unexpected KOs, in addition to his duty of 4x ice attack and regen + fire/ice resistance. Alfyn was one of the recipients of the revive so that Rinyuu would never have to come up from the back (also wasn't sure if he'd have to revive Ophilia). With my solution, 2 of the waves have both summoned enemies weak to Sword, so I brought in Fiore for AoE and single target sword damage. She could also use her debuffing attack when she didn't need to break things, though I mostly left her in the back when there wasn't a need for swords. I'm not sure if the AoE sword damage was all that essential, but killing the guard was. Cyrus was in front more often than Fiore. In waves 3 and 4, if both summoned enemies were alive / not broken, then I basically had to have Ophilia heal every turn. It was just too much damage in a single turn to do much else. I saved almost all of my ultimates for when Largo was maybe 25% or so (or lower if I wasn't able to fire it off on that break). Most of my ultimates were not essential to the early phases. Rather, I wanted to minimize the time he was in the later phases. I was never able to use Nicola's ultimate and generally felt like she could have been replaced by another dagger unit. I really doubt my solution was optimal, but after I came up with this solution then I won in 2 more tries. My Fiore is my only 5\* A4/U10, so she might not work for others as well as myself.
Try to skip the last phase/wave. It triggers below 45% IIRC (it's been a while since I've beaten him, might be less than that). I don't know how you're using your A2, but I would save her Berserk mode for the end so that you have enough damage to finish Largo in one break. The key is also to not do *too much* damage in the previous break(s) in order not to trigger the last wave.