You do 0 damage when the aspect with the chance of additional bounces rolls a miss. Which is at least 1/5 of the times. Also if you are too far away from an isolated mob for the lightning to bounce. Beware of suppressor affix it kills CL. It is also a clear skill by unfortunate design - it does better with a staff. Next you may want to have an item with the aspect for extra attack speed when both conditions on the ulti fire crit passive skill are fulfilled to swap for boss fights.