Main problem is usually people dying to avoidable things like bombs and weights, falling off the edge at some point, or failing to break Heart.

People should at try for Ifrit or Garuda weapon. Those fights are considerably way easier than Titan and it doesn't take long to kill either of them with a half-decent group. Having mostly AK and Darklight gear is also a definite bonus.... people should have at least 3200 HP in case they do screw up and get hit by a bomb.

Helps to have level 2 limit break up for Heart if DPS can't quite get it down. Build up the meter about half to a bar in phase 1 before pushing him into the next. Healers can also help do damage since he only stomps once during heart phase, giving them a lot of free time if no one is getting hit.