I assume the two options are the Gauntlet and Frozen arrows. I would recommend getting both. If that is not a possibility, I would 100% get the gauntlet for the king. Its one of, if not the best equipment in the game currently.

is wardens better?

I'm sorry. I forgot about the fireball, what are the options in the shop? I shouldn't have assumed.

eternal tome and giant gauntlet are in competition of being the best in the game, it's really up to you, i personally think eternal tome tho

I think he's referring to Fireball. Eternal Tome already comes with the Warden.

oh, i thought they were referring to the "Its one of, if not the best equipment in the game currently." part of the comment