First reaction: argh why does nitori not have paralysis immunity
Second reaction: Not a bad team. Better than my squad in some ways. I didn't use Alice, Remi or Aya, instead I had Tenshi, Suwako, and Yuugi here.
Third reaction: patchy is taking damage from magic WHAT THE HELL
Fourth reaction: Eirin isn't spamming Astronomical Entombing? Lucky!
Fifth reaction: You have a perfectly good Alice there, quit using Iku for offense and buff her...oh, Reisen's dead already, never mind.
Overall, It was a pretty ugly fight but you pulled through without knowing all the tricks anyway. Of course if Eirin had used Entombing more you'd have been screwed. For good Eientei strategies the four posts starting
here should help a bit. You do seem to be good to go for the next two floors though, if you just slap a couple PAR resistance items on Nitori. I'd highly recommend completely clearing out F13, because I moved up before doing so, then I got wrecked by the 14F bosses and Mokou. Are you going to use Reisen? You seem to like debuffing a lot, so she could be a good choice for your team.
Also, since I can't repeat it enough, NITORI PAR IMMUNITY. Why risk the best damage in the game getting frozen and useless for the next few turns?