Way back in Beta, I heard a rumor that the Devs were working on a "Monkey Island" Power Pool that was like the reverse Leadership Pool, and you were mocking and taunting your enemies. I think a better nickname now would be the Deadpool Power Pool, but regardless, I wanted to suggest this set. I think this would be great for Tanks, Brutes, Sentinels, and Masterminds, as it would draw Agro like all Debuffs do. Here's just a quick idea of what a "Reverse Leadership" pool would look in my mind, but obviously it could be balanced or enhanced further.
Banter Power Pool
Mocking: Toggle, PBAoE Taunt, -DEF(All)
Belittlement: Toggle, PBAoE Enemy Taunt, -DMG
Fooling: Toggle, PBAoE Enemy Taunt, - ACC
Ridicule: Ranged (Targeted AoE) Slow, -Recharge
Embarrassment: Ranged (Targeted AoE) -DEF, -DMG, -ACC