So I love grinding Hero Merit using auto battle strats. When Developer Maps return I'll be all over them with methods using all kinds of units. I've also discovered some strats for Blessed Gardens, which provides the same amount of Hero Merit but naturally requires blessings on all units that enter, and that's not very friendly to the idea of grinding Hero Merit for units you can't see yourself using. With the removal of stamina costs for Hero Battle Special Maps, these are a newly viable method