Here's a powerset idea I've wanted for a while:
Staff Blast
Concept: Attack your opponent with attacks from a Staff.
Archetypes: Blaster, Defender, Sentinel, Corruptor, Dominator (Secondary)
Special Mechanic: Includes a power that changes the damage type. (Similar to Dual Pistols) Options include: Fire, Ice, Energy, Negative Energy, Psionic
Staff Customizations: Same as Staff Fighting.