I had a healing Aerial Turret build that might’ve been able to go the distance for most of this run, but I’d been hoping to try the new Oblivion Cannon. Finally found one on day 12, and had saved a completed Hammer and the fire enchant gem from the temple for just such an occassion. Immediately grabbed it, upgraded it (and was stunned that its cooldown went down to 5 seconds from that), and slotted it into the build, and it was already nuts. Fights weren’t even close after that. Tinkered with it until this was the end result. Also, Relay Drone is probably OP too, used that for most of the run and boy did it seem potent at gold+ (less so at silver, where it just charges one random item, but still not bad).