You want to start out with your Affliction dot so you can get your proc chance going. Then lightning until all your stacks are up. Crushing Darkness after that. Chain light when storm is active, Force lightning when barrage proc. Not sure what level you train the different skills anymore, I pretty much level'd over a weekend. Then....Slept a lot..
Go with Force>Aclarity>crit>surge and you'll do fine.