I would like to know how Phatbat, Flameheart and Neriya are getting 100% heals landing on their fights with Poison lord and Titanboa, Phat and Flame both healing for 85k+ and never missing one hero, and neriya doing 57k on Titanboa with 100% heals landing.

I know there is some kinda sweet spot where maria heals very consistently, but didnt think it was at the higher tiers in magic attack and hit chance. if someone could shed some light on this it would be greatly appreciated.