Re exfil: I assume that the Invincible is the sort of ship to have a hangar bay. Maybe we could grab a transport of some sort off there?
I briefly considered the Invincible's own escape pods, but they're not likely to be easily steered and CIS pods are more likely to be picked up by CIS ships. Plus I'm not sure how many pods the CIS would bother to put on a ship crewed mostly by droids. (If anyone is going to cut corners, it would be the CIS. Something for their admiral and his staff, but nothing for anyone else.)
Otherwise we have to depend upon spacesuits and locator beacons.
... Or could we arrange for a suitably sized Republic transport to be captured by the Invincible, and when the Invincible is in chaos/breaking up and we need to leave, we grab the ship that we know is already there?