That has to be rough to dps the turtles full time as a melee. I'll cleave when they first come out or if they get close to me otherwise I'm on the boss 100% of the time. Have range kick and assign a back up or two in case the designated kicker gets in a bad spot. We have our hunter slow the turtles/bats and also MD the bats the best he can to the tank. We also have myself and the other melee stack so that we can move as a group during the rock fall.