My plan so far, due to the lack in both numbers and strength for my thunder kamihimes is this
F1: Rosenkreuz(don't have solomon), Ramiel, Jupiter
F2: Rosenkreuz, Baal(Unleashed), Justitia
F3: Rosenkreuz, 2 R
F4: D'art+ambush, 2 R
F5: D'art+ambush, 3r
F6: D'art+ambush, 3r
F7: Mordred, 5SR
F8: Mordred, Baal(Unleashed), Jupiter, Justitia, Ramiel, off-element balance sub
F9: Water or Fire team
F10: Fire or Water team with Venus/Prometheus in Sub for defense KH
F11+: Throw everything at it and pray I make it before event ends.
Don't have any leeway for changes, at most maybe being able using an off-element with 2 balance for F8, and push everything down to the next floor for a higher chance of finishing F11.
I read from wiki hp etc. carries over and isn't reset if I fail a quest, so I am probably very likely to finish F11, but probably won't make it to F12. Will have to see how hard the mobs and bosses actually hit.