Role: Boon removal, DPS and area denial
Staff is not as efficient for either damage or boon removal but it is recommended to have one or two scourges in the squad to run staff for its Mark skills. These marks are useful for revealing stealthed enemy movement in scenarios where they are attempting an ambush. Having marks placed in a direction of a possible attack, e.g. along the choke/tunnel or around the portal of an enemy-held objective can give the squad sufficient forewarning and impact the outcome of the fight.
Axe provides short range aoe corrupts around the caster and a strong non-projectile single-target lifeforce-generating damaging skill
Dagger provides extra corrupts with blanket conditions and a personal condi cleanse.
Focus has a powerful single target corrupt & spike damage skill especially effective when used along with Axe 2 for bursting down enemies caught out of position.
for dagger/focus variant
over if you have good Firebrands.
Consider taking over for more boon corruptions by triggering in fights where your HP drops under 50%