Just the other day in Ravana Ex, we were doing some runs for a person and had a couple of DPS die to Final Liberation. Ravana was at 2% when he came back down, figured we could kill him right then and there. Nope, he activates his Warlord Shell so he's basically invulnerable for a bit. Of course due to the lack of DPS on the shell we failed the DPS check, but somehow by some miracle the people still alive managed to kill Ravana as he was casting Warlord Flame, the instant wipe move he uses on the party lol.