I'm trying to get much higher than that but finding it difficult, the majority of my time is wasted on the part where you have to switch to Engineer and repair the generator, I can Blow the barricade and switch to Engineer in about 30 seconds but from there about a minute or two is wasted as enemies keep coming up the stairs and mowing me down while i'm repairing it.
Any tips will be appreciated.
-Sykoschematic