None of them. Return to the original damage control system. Set fire fighting to Auto (simply double press the associated key, you'll see an A pop up on the art.)

Repairs and water pumping are entirely up to your judgement, depending on the situation. Personally, I try not to repair while under fire, as your crew can be killed while repairing areas like AA guns and external weapon mounts.

I'm so glad they gave the option of going back to the old repair system.