So, I reinstalled Revolver with a couple unrelated tweaks applied to it. When it came up gmail still didn't want to play nicely so I uninstalled the updates again, still didn't work, cleared its data and that did the trick. Gmail works right now, back up to date and still working. It wasn't Dalvik cache either, clearing that earlier didn't do a thing.
At that point I tested the accounts & sync in settings, and it worked right. I got that set up right so sync works again, then I went in to Titanium Backup and removed a few stock apps I don't use/care about. Later went back in to accounts & sync, and it's crashing again. So at least I know what's doing that.
If/when I find out exactly what did it I'll update so others can know what not to do.

If someone already knows where I screwed up they could save me some trouble.
edit: btw removing stock MusicFX makes the sound options in settings crash, even replacing it with the one in the market doesn't help then, has to be the stock one.