Thanks for the feedback! I'm wondering if the melee attack did more damage and/or the buff it applies did more it would fix this or maybe not.
After reading your feedback and VoidChair's I'm thinking I could have redesigned it to be a boomerange type attack where if still allows you to keep the healing buff up on the boss, but you lose the beam while the wrench is out of your hands. So its better to be in melee when you can. Or just remove it lol.