Hope has 800 hp total, and she will only attempt to heal when her hp is lower than 5% the idea is to make a good attack or attack item, before that happens.
Just fyi she is the last enemy to use healing skills
When I tested her, her healing was about 250- 300 at most... I will check her stats (probably luck and hit is a bit wild) 500 is a bit too much, I will keep that in mind for the next update. Thank you!