How to prevent the curse power from being used at the start of the wave?
Or to remove the effect entirely.
I’m fairly certain I could defeat the enemy team if it wasn’t for the curse effect.
Mad Hatter or Donald can block the Hex from being applied.
By playing on manual, you could also try to avoid it by using white skills towards the end of the previous wave.
Any hero that can cleanse can also remove it, such as Kevin Flynn, Rapunzel, Powerline, Ariel and others.
You could also just try taking out the Mim in the first place with heroes like Chip & Dale who have strong entrance skills
Tried using up all my energy on wave 2 (curse is in wave 3).
They regained all their energy just as the wave ended 
Tried using Ariel’s white skill to remove curse, no effect that I could see.
Baymax is the only strong hero I have with an entrance animation, it wasn’t enough to take her out.
Unfortunately for me, the upgrade costs are so expensive by now, I can’t afford to max anyone else out if I wasn’t already using them.
Ariel is hexed too, that’s why
However she will quickly cleanse someone if you can not use white skills for just a couple of seconds, that might help
