Talk:Asterios/@comment-24857712-20180720091100/@comment-35041069-20180721010025

Hans can provide crit stars to power his brave chains up when Labrys is Active. He can also use his NP to heal and buff Asterios' attack.

Tamamo can bolster his survivability and help charge his NP, while also lowering his skill cooldowns so he can do those Labrys nukes more often.

Helena can do a bit of all of the above (save for skill cooldowns and healing), helping his NP gain, provide crit stars, boost his damage and also help keep the opponents' defence down.

So each have their own niche.

Hans for budget teams (like when you have a 5* frontliner), Tamamo (with 2030 if possible) when you want to spam the NP as much as you can, Helena working as the allrounder that can fix any particular shortcomings Asterios has at the moment, save for healing him.

So for different boss battles, you want a different build. But I'd say Tamamo with 2030 is probably most ideal. She provides sustain, is quite beefy and has a targetable arts-up for times when you can do Arts - Buster - Quick or NP - Quick - Arts brave chains, while also helping with the skill cooldowns to make those nukes more frequent.