I think you're not understanding the issue i'm pointing out, the entire gunbreaker rotation lasts exactly one minute from one No Mercy to the next, but if you have too much skillspeed, you lower that time from 60 seconds to below 59 seconds, then you end up with 3 Erda and have to wait for no mercy to be ready or spend one Erda on Burst strike or waste one Erda by using solid Barrel because you're one global CD too fast.