Generally, the reason to skip the other titans is because I'm good on high MV finishers at the moment. I think that Ulamog TCH does what you need your high-drop finisher to do, which is stabilize the board, which is something that Newestlamog doesn't do when it comes down. I think new Kozilek is fine, but I kind of like still having one of the OG Titans for nostalgia purposes. There's very much a part of me that wants to try the new Emrakul with masticores and Key to the City, but I do agree that it would probably pretty much just end the game rather than be fun.

Angelic Aberation may absolutely end up being a power-level outlier that ends up with a lot of non-games and gets cut, but I certainly want to try it first. Inversion Behemoth seems interesting, but I don't think it has any particularly interesting synergies with anything in the cube already, so I'm not that interested in it.