Ugh, took too long to post, I'll post it down here in case you miss it.
ok, I looked through. You have quite a few developed cards, while I have like close to none. The first 5 should be easy enough for anything to handle, but this is what I've come up with.
Basically, my 'viable' leads list comes down to: Kirin, panda, bmeta or valks, Kushi, ayomi, Izanami, Akechi. Also technically I have a fenrir that I just rolled that's underleveled. So the possible pairups look like this:
Roah/AA Luci x Panda, viable for earlier levels for the devil bonus
Bastet x Kushi, combo multiplier
Ammy/ZL/Elia/Kanna/purin x valks or bmeta, more or less unconditional multiplier
Yomidra/Castor x Akechi/aYomi, the match exactly 5 dark orbs with one enhanced leads
Fenrir x Fenrir, though I'll have to primarily play support
Isis/Sakuya x Kirin, rainbows
watchoo think?