That was my first time playing the Engi-B. It looked crazy, starting with only one crew. In case it wasn't obvious, this was on easy.
I'm actually surprised I won. I had a fully leveled mantis boarding party up until the system right before the exit in sector 7. I was a second away from killing the last two crew members when the ship jumped away with my boarding party still on board!

What's really sad is that I was already fully upgraded. Full energy, max shields, max oxygen, etc. I don't know why I didn't just go straight for the exit... And then I lost my boarding party, like a dumbass.
And as far as this counting as a win, he definitely died first. He got one last shot off right as mine hit. It was that burst of lasers, which move pretty slow...
Considering your goal is to stop the rebel ship from reaching the home base, shouldn't it always be a win if that ship dies?? I mean, we accomplished the goal, didn't we?