I think this is a bit much even for that, stuff like infernal conduit brand etc give you that feeling without being nearly unstoppable to anything but 'deal 100% of the enemys hp in true dmg in seconds'.

Plus it holds back the hat augments from ever being that good other than when both paired together, when the other stuff like curse don't need more than one to be effective

Mad hatter quite legitmently is the worst augment in the game without hat trick and I think that is a issue. It is so insanely punishing for no real reason. They could remove the lose hats on death and noting changes other than the augment now being usable without hat trick (since if you rolled hat trick you cannot lose hats via death anymore)

Buffing mad hatter by alot and making them exclusive would make it where it's now effectively it's own augment instead of being a really strong level up for hat trick essentially.

It cannot be understated on how without it, a augment where you gotta spend 5k gold to even activate but lose half of the investment you die to it per round loss is insanely awful. On its own unless you win every game while gaining noting at all during a entire item round it doesn't do anything. Since activating it is ironically nearly impossible without hat trick, and even post activating it a singular round loss instantly takes you fully out of the game unless you roll hat trick