definitely mordred .. her skill that applies tons of debuffs will work perfectly with yamarajas .. plus yama has different frame debuff to mordreds, so can be 25% atk/def debuff .. bryn for atk buff, amon for block debuff and...beelzebub is nice at the start of the game for any team as she can apply rampage, but can be replaced in the future for another ssr? fire hime...