Warrior - bats
Dk - tortos
From the limited information I've gathered, it seems players hit one of the crystal shells initially, recieve a 15% max health absorb and then they are able to continue damaging the shell or by healing them to stack it to 75% of max health before each quake stomp.
When the whirls come we will have our warlock slow them and dps them down. Sub 20% we will just burn boss.
When the bats come, stack warriors crystal buff and kill them at the boss so that he can be cleaved.
I think the shells will die if they take too much damage so is the best course of action to stack it only through heals?
Thoughts and suggestions?