last test for now

i hope this one concludes the mystery hahaha

original stats:
Vivian MC with dark MH 1492HP
Beelzebub 1281HP
Baal 990HP

now, i add Ouroboros with 407HP to sub eidolon - Ouroboros aura is only attack bonus, no hp bonus

Vivian 1954, meaning 462 diff, or ~13% over 407
Beelzebub 1728, meaning 447 diff, or ~10% over 407
Baal 1397, meaning exactly 407 difference

i think it confirm eidolon add 10% bonus stats to same element MC and kamihime, because Ouroboros does not add bonus HP% via aura