If you are doing the story quest one, it's really easy when you realize her teleports are always at the same place so you know where to run to for cover. She always teleports to her start position > entrance alternating each time she teleports. Also it helps a lot if your tank does their limit break when she does her ultimate move. Tell them to use it when she says THE RECKONING COMES!!! or something like that, it's a text box in the middle of the screen, you can't miss it.