Make cast sequence macros if you can't figure out how to link up some skills. Like on my 4xshaman 1xMoonkin, I got the Moonkin using the same macro for almost every single DPS situation. The macro does a rotation of wraths, moonfire and insect swarm while the shaman choose one spell at a time between Lightning Bolt shocks. When the shaman does chain lightning I do a starfire. And when I cast purge on the shaman, the moonkin does faerie fire. I figure, while I'm dispelling him might as well also debuff him. This may not be the perfect setup since I just started doing this, but maybe it'll give you some ideas. Play around with it.