Bruno and the Sapper are still in uniform, not that that will help a great deal since Death Cheater isn’t.
People with three AP – all right, that’s the medic – can’t get to the NW room this round, so he’ll have to be in the W entrance room, which leaves him shot at by the sentry E plus the two newcomers there. Or, I wonder whether he should go just one room and save, this time; otherwise he’ll have at least two enemy shooting at him with no saved AP to shoot back. But then he’ll probably be stuck behind enemies.
Bruno can get to NW and save, as you say. DC and Sapper can get there by spending 4 AP. That leaves only Bruno’s single saved AP to deal with four enemies from N and W. Any remaining enemies at least have to spread their fire between the three people there.
We accept that the alarm will be going off.
Perhaps sapper should crowbar W.
Bruno: Up, N, N (stealthy, has a saved action)
Sapper: Up, E, N, block W entrance (stealthy, no saved action)
Medic: Up, E, N (visible, no saved action)
DC: Up, E, N, N (visible, no saved action)
Medic: Up, E, save (preparing to shoot when the enemies from the E come in), then next turn something like N, N, E once others have cleared the way.
Then Sapper and Medic can share the pain from the three who’ll be east of them, and Bruno and DC can share it from the two east of them