I would use the damage one for your troller. I got my dominator perma'd and can comfortably switch between the recharge and endurance ones. You have steady sources of damage, so that might be a good one. I used mine so I would not have to depend on domination for my endurance issues. I go from hitting dom when at rock-bottom end, or never going below half. I bet the same would be true of the damage one to som extent.
When alpha first appeared the natual choice was Spiritual for recharge, whilst alpha-ing my FireKin I re-fell in love with him so decided to spend my hard won inf and purps on him so without the alpha he has perma hasten (without Siphon Speed) effectively perma flashfire too (recharge 27 sec, duration 31 seconds) no end issues so Im thinking of changing my alpha slot choice but what too?????? All help appreciated