Decided to try Hera-Is Mythical. Kirin invaded the 2nd round(jerk), she didn't want to die, so she live with 10 health left. I threw a stone and finished her off. Cleared the rest of the dungeon without incident, though I got little lucky on the Legendary dragon(why couldnt invade that guy instead?) Worth? Idk, but I like to think of myself as saving myself from the frustration of getting one later.