notes:
You don't need to pop any actives to kill Suzaku or Byakko if you get a good x20.25 (I've killed Byakko with x16 before) so you can cut time there
Same goes for Karin technically but she resists half your team sooooo pop Spica for good measure and to save fire orbs for Genbu
Genbu is the first major wall; you'll need a Fire TPA, maybe a Horus enhance, and 20.25x to put her down. However, you need Antares's active later to kill Kouryuu in a single turn. Do your best?
Byakko is a pushover, but Kirin has a ton of HP. Castor is your best bet to push her HP down.
Then it comes to Kouryuu and whether you have enough hearts for Antares to give a good board, and of course getting orb trolled out of 20.25x is killer.