Personal general use build for my main.

Steps for success:
1: cast eclipse
2: get max buff
3: go invisible

That's it. Once you activate prowl it "saves" the light level for eclipse which provides an infinitely lasting damage buff and the generous duration makes it easy to maintain by simply refreshing before the duration expires. Energy usage is low, an occasional energy orb will easily keep you topped up. Use with your silent weapon of choice.