Healer/dps isn't too bad, it gets a little more complicated when you get into healer/tank/dps :P I'm sure you'd do fine with a healer/2 locks. My suggestion for the healer? Shaman

First chain heal is op second I'm drawing a blank on the name atm but it makes you cast faster HEROISM thats the one. Heroismd SoC's pewpewpew