Class help for HoT
The Dragonhunter, being an extension of the Guardian, has access to lots of boons for both himself and his allies.
The Druid (Ranger elite specialization) can use both a staff and obviously a bow and has so much support in terms of healing their teammates.
The Revenant is the new profession coming with HoT. Revenants mostly specialize in boon sharing. However, they cannot use a bow and their staff is used in melee.
Vaulting daredevil leap frog teef of AoE destruction