I found LB was useful against some of the close in melee players ... i was able to kill 80 melee with FS + EM + LB (and sometimes TS) - but it's got a 3min CD, and you need to be specc'd elemental. Spreading out is key - don't have 1 toon run back. 2 strafing one direction is still better than all taking an AOE hit.