I don't understand what is so wrong about my suggestion. With the same stats, not considering attack speed or cast time, Rune will do more damage then emperium aurora, and with the right HP modifiers, it adds more HP. +20 all stats, +5% demi-human damage, +4% HP is still good. The second best aurora there is, like it should be. It's a donation item, Emperium Aurora is not, it's harder to obtain, it's stats should reflect that and should not be in 'close' competition with a donation item.
Emperium Aurora did more with Asura strike because of the +% demi-human from Thanatos x2 (1+.28+.28+.5+.1) in HerLove's weapon, which makes the added damage modifier from the Rune do less, but you forget that not everyone has those cards.