@kate: I like that one. I need to and am stealing it. My version is like this:

/castsequence reset=target Moonfire, insect swarm, Wrath, Wrath, Wrath, Wrath, Wrath
/cast starsurge

Basically I get both dots up on my target and then spam Wrath until they drop off so it will reset back to dots. I cast starsurge on CD and if I am PVPing the target change lets me do both dots on the move.