Guild Wars 2

Purely for a WvW Zerg point of view

Is zealots (++Power, +Precision +Healing Power) a viable build for an engi who’s too cowardly to go frontline and hangs around back with his grenade kit or is the healing power worthless?

If you’re staying out of the line of fire, I’d probably suggest something a bit more full-on offensive, like Berzerker gear. Given that zergs reputedly involve a lot of Retaliation being passed around, it’s probably a good idea to minimize how many attacks you need to do an appreciable amount of damage in order to minimize the amount of Retaliation eaten.

just zerk it