Rumia(Moonlight Ray)
what
Okay, it's like Silent Selene for a few floors, but it's REALLY nothing special by the time you reach the 10~12F puzzle floors. It's nowhere near nuke material because of her non-stellar MAG, and her MND-ignoring spell is similarly luckluster, especially when you've got Kaguya instead. And on top of that, Rumia has PITIFUL HP and speed, terrible DEF and only decent MND. Why in the world are you thinking of using her for a run that would require only the best people to be used?
Yuyuko is also terrible. I see what you mean by the instant death, but her spells also have massive SP cost that can't be handled until late floors (which is where you get her, normally), and they do so-so damage ONLY of SPI element except for the one that costs an arm and a leg.
The rest doesn't look bad (And I think Remi is a great choice, she doesn't scale into Plus as well but for main game she's great), but IMO bringing Mystia would be a great idea. Renko as well. Any boss that can be hit by PAR with any decent chance will be MURDERED by having Renko or Mystia, plus Renko's debuff should be incredible as well, even though it's pretty expensive for awhile (SP boosting gear, anyone?)