IN with Sakuya is fucking retarded. Not only is there the "LOL LETS TIME EVERYTHING OUT" factor, but that means Tewi won't drop a life if you time her out when you time her out, and since Sakuya can't kill shit, she has a hard time opening holes to the PoC when beefier fairies are in the way. I had an attempt a while ago that at least made it to Kaguya (second noncard, I think), without either Tewi's or the 1100 extend. I haven't cared enough to give it more than a couple attempts, though. (It'd probably also help if I actually played IN once in a while. At this point, I've probably put more time into UFO Lunatic than IN Lunatic.)
And yeah, "AAAAAAAAH YIN-YANG ORBS" doesn't help either.