Look like you are not playing this game. 5 taps mean you have 5 "taps" every turn, high recover mean you heal more each time you tap heart panels. Auto win is enemy disappear instantly when quest begin.
Acient vault 1.2mil + daily quest 1.8mil + farm 100 time at chapter 6-21 with mod in hot time event = at least 5mil every day.
I use gold for upgrade and create heroic runes, sometime summon x10 for atifact frag but gold never under 15mil.
Im doing b65 right now, but still using acient. That not easy to get gear with 3-4 combine option like atk-speed-crit-crit dmg. If not, legend or acient same.
Dont use legend gear if its not t6 and have at least 3 good option suitable with your heroes. Most of top rank still using acient, legend base stats not much better than acient, only for 1 more option.