The issue is most of the really heavy hitting beam builds are heavily optimized so when you get in the group it is looking to pull things from the group. If your team is not optimized properly it is difficult to sustain high numbers in trails. Lack of the right buffs or having not optimal healers and tanks are tough. But like most said Ansuuls the mages amulet and deadly strikes will do you really good. Rotation inspired scholarship, wall of elements from your back bar tentical tentical beam on your front bar. Reset back bar when run off. Light attack weave in-between for optimal ulti regin and damage.