Evidence that hero score is actual might. Not all heroes have identical might.
At least according to the wiki legendary heroes are 5 might per level
Might from hero base and actual might boost are 2 different thing. All legends give 5 might per lvl.
You can look some old threads from september where gyus and me talk about that lol, he got it right I also thought that back then.
Let say if you had 2 same heroes:-
1. PD 150 berserk 4/5 8/9
2. PD 155 revit 3/5 6/9
I believed hero number 1 will had higher might. However for arena, the game selecting the hero based on might or level?
Arena picks the highest level hero. For heroes of identical levels it will pick the one with higher might.
Actually I asked the same question to live support before. What they told me its based on might... So its based on the hero's level after all. Thks