Welp. I've now reached Limit Cut in P12S. Anabaseios is probably the best tier so far in Pandaemonium. Definitely a LOT better than Abyssos. Quick breakdown of the tier so far.
P9S - Easy but good as a first-floor. Levinstrike is the "Devour" of this fight in the sense that you'll see a lot of wipes there. Fortunately, it's pretty early in the fight and there are strats that make it braindead.
P10S - Probably one of the best fights in the game but it's harder than you'd expect. It's the difficulty of a third-floor in the place of a second-floor and it definitely feels like this is the "wall" where shit players will get stuck and give up. It's also got one of the craziest heal/mit checks in the game. If you don't tank LB it then you'll need to dump everything in to survive it.
P11S - It's basically Fatebreaker again. Not bad but not massively original. Dark & Light is a cool mechanic (you've basically got to keep tethers stretched or close together while resolving mechanics) but they only did it once. Apparently people get stuck on Letter of the Law, but that mechanic is basically just putting together other stuff from previously in the fight in a different order, with some two-person towers.
P12S - So far, this one humbled me and reminded me of the difference between the first three floors and the final floor of a tier. Most mechanics are body-check mechanics that wipe the party if failed, and all have random elements so there's a few different things you might need to do based on debuffs or what others have (like you might need to drop towers in a different place during Paradeigma 3 if the DPS on your platform don't have the element you need. Or during Superchain 1, there's an entire thing of stacking on either the left or right side depending on your element, and at the end you'll either have to drop a tower, soak a tower, or bugger off so you don't cleave others with an AOE).
I've glossed over a guide for phase 2 of P12S and it seems like it's similar to other fourth-floors in the sense that it's a bit easier than the first phase once you know what to do, but knowing what to do and how the fight works is the difficult part.