If you are taking the DH tree in Berserker’s and aren’t taking the LB, you are doing it wrong. LB is the only real reason to take the DH tree in PvE as it currently sits, unless you are playing a high healing power build to play as a healer alongside Druids. It’s worth mentioning that a healing DH is definitely viable thanks to the massive heal value and scaling on Wings of Resolve, as well as the reduced CD on Wings over Virtue of Resolve.
The Dragonhunter build works wonders with a Greatsword. The traps are very strong, but people seem to think they are designed to only work defensively. If you jump into the fray and drop them directly on enemies on cooldown, they work even better.
Leap of Faith + Symbol of Wrath + Traps = Lots of dead mobs.