No, that’s absolutely the wrong tac. That is because boarders will never go to or stay in a room without oxygen. So if you leave the O2 room with some and vent everywhere else, then that’s what they’ll try to break. Which is emphatically not what you want :).
By leaving only the medbay oxygenated, you’re funnelling every single boarder towards it. 2-3 will get in and fight your dudes (who’ll get healed faster than they take damage), the rest of the boarders will mill around and suffocate or try to do damage to the nearest room. But mostly they’ll die before they damage it. If need be, you can leave a second, damage resistant (like your engines) or non-critical (like hacking, cloak or mind control) room with some oxy to draw them there, then vent it too once they’re in. In which case they’ll keep hitting it while they die, then try to run to the medbay soon as one of their friends dies, and take more suffocation damage along the way. But I’ve hardly ever needed to do that.
Also, a level 1 medbay provides just enough healing to counter the damage done by zero oxygen. Which means that even if your O2 gets busted somehow while in the middle of the manoeuvre, and provided you have 3 crew with full health available, you can run one to the O2 room from the medbay, start the repair, run a second one who’ll take up the repairs while the first one runs to the safety of the medbay, and finally run the third to finish the repairs. The key is to never leave the O2 room unattended so the repair bar doesn’t go down.
A level 2 medbay makes the whole process even easier, since it heals faster than asphyxiation hurts. So you can just heal everyone to full before starting the daisy chain, and can possibly make it work with just 2 guys (never tried). And naturally, Lanius and system repair drones can repair just fine without air, which is very welcome on Engi B.
Of course, if you have more crew than can fit in the medbay, then venting the whole ship’s not a great idea - but then you also have enough crew to fight fairer.
[QUOTE=Budget Player Cadet]
EDIT: @Kobal: Halberd beam is good? O.o
[/QUOTE]
Sure. It only takes 3 power ; can eat through one shield (e.g. the one left up by your ion guns, or that missed laser shot) ; doesn’t fire too slowly - once every other salvo, more or less ; and does a shitton of damage (4-5 IF it goes through one shield, 8-10 without) PLUS breach. Breach slows down repairs a lot and helps kill the crew as well.
It’s the Glaive beam that’s no good - while it does 3 damage, it fires slow as molasses and takes 4 power.
Oh, but speaking of power and time-to-fire : when your weapons bay takes a hit, the rightmost weapon on your bar will get deactivated first, then the second to last and so on. So it’s a good idea to put your smallest, fastest weapons on the right and move the slow or charging ones, or the decisive “panic button” ones (like breach bombs or Pegasus missiles that you don’t necessarily want to use every fight but will shut down the enemy weapons room RIGHT NOW while you repair your own stuff) in the leftmost slot.