I tried the a few things.

/cast Dispel

/castsequence Dispel

/castrandom Dispel

and the toon just gets stuck trying to dispel.

So I am thinking of using my second bar as a "Boss Mob" bar. Where like 5,6,7,8 can be my shamans/preists trying to cast something. So if I see things pop up on my guys I can just spam the appropriate button and hope it goes away.

Anyone else have a way of doing this or macroing this?