Minor suggestion: instead of cyan for the warrior, how about a shade of red? If I'm not attentive, I'll be upgrading the priest thinking I'm upgrading the warrior because their colors are so close together.
Prestige cap is just a really, really bad idea. >.> Instead of being able to continue to play until it slows down, reset, play further until it slows down, reset, etc., now it's just play until it slows down .... then disappear for weeks and maybe remember to come back and check.
Unless something changes, both MP and MpReg should probably cap, or cap earlier than they do. At level 60, it is showing MP lvl: 20 (+3.24k (+8.12k total)) and MpReg lvl: 12 (+113 (+289 total))
The total spell cost, however, is 5+15+35+5+35+100=195. I regen more than I use, can still up regen, and MP total keeps scaling upward as I level...
 "Enchanted Heroes"){kind=icon}
 "Crush Crush"){kind=icon}
 "Idle metropolis"){kind=icon}
 "Idle Dungeon"){kind=icon}
Working on this right now! Thx for feedback. Edit: Updated game to v0.70.51, together with a few other changes and fixes