The claim was made that all I needed to do to defeat Madame Mim was to raise my team to her level.
I should not have listened to that person:
I expended all of my resources getting my 2 most powerful heroes to near her level and this made absolutely no difference.
Resources it took me months to save, all gone in a few minutes.
Also look at the level disparity, 407 vs 342.
I deployed an entire team of 407, how did this not result in instant annihilation?
This is why I firmly believe Madame Mim should not be in the game, this level of resistance is very much like cheating.
No one enemy should be able to oneshot an entire team, especially outclassed like this.