Hi. 

I'm thing about this monsters, they are Void Epics, they add Block Damage and Unkillable (save)

Warcaster 3th skill:

Invincible Aura (Cooldown: 6 turns)

Places a [Block Damage] buff on all allies for 1 turn.

Level: 2 Cooldown -1

Level: 3 Cooldown -1

Maneater: 

Ancient Blood (Cooldown: 7 turns)

This Champion receives damage, then places an [Unkillable] buff and a [Block Debuffs] buff on all allies for 2 turns. Damage received is equal to 5% MAX HP for each alive ally.

Level 2: Cooldown -1

Level 3: Cooldown -1

I'm think Warcaster need buff skill : "Places a [Block Damage] buff on all allies for 2 turns".

Now you don't use warcaster becouse maneater give you 2 safe tures, and Block debuffs.

I'm know cooldown is better in warcaster, but maneater give you Block debuffs too. 

So i'm think good idea is change 1 to 2 tures for warcaster's block damage, with no change cooldowns.

after the change you will be able to choose what you care about.

Now WC is unused.