I’ve made a thread about it you can read if you want. In-depth "Tank on E" rework for Bastion
Basically reduce the damage to 120, and it drops to 75 beyond 40 meters or so (Alternatively, just set it to a constant 90 or so. That will 2 shot Tracer and Zero Suit D.va, and 3 shot everything up to Mei/Reaper/Brigitte). Limit the ammo to 3, make it recharge like Doomfist’s gun at 1 shell per 2 seconds. Remove self damage. Reduce transform time to 1 second.