I also have used similiar strategies with WMG... with the add on of using Time Distortion Burst weapons from the Temporal Mechanics tree to get rid of the shields. Love that quad damage to shields. With that I take out the shields and then destroy the armor and components with the WMG.
Also I have found that generally CSM are a much better deal early in the game than later on when everyone has had time to either develop PD or steal it from someone who has.
