Cu :P

Avicebron is budget Cu, so that works in his favor.

It's not that Sieg is bad, but Buster has the advantage of not caring about enemy quantity.

Haha. No. I refuse to ever use cu.

Sieg wins. Still, if refund would be an issue, Avicebron would be the better choice there.

Cu is the superior Buster looper, but I understand he isn't in Apocrypha and so shouldn't exist in your Chaldea.

I never used them to farm. So I don't know

Avicebron's best purpose is to clear one wave then get killed off and use his third skill. Poster Girl works real well for him since it buffs his damage by 60% then gives him 3-turn taunt. Best used in nodes where you first face one wave then a single target enemy.

Best used if he has max mana loading so you don't need to charge his battery via someone else. He can just charge it himself