Board Thread:Question and Answer/@comment-107.15.133.241-20161211044636/@comment-26039274-20161211064808

Yes, you can check this link for the formula:

http://valkyriecrusade.wikia.com/wiki/Elemental_Hall#Rewards

AEH has only Lv350, Lv400 and Lv500 archwitches, with Lv500 having combined HP of 2.8M