The only strategy on this level is to push your allies. Pushing Master Guns to his location saves less than a second, but pushing Sgt. Johnson saves more time. Wait for him to finish walking out, then push him back into the elevator, near where he would walk back. When the elevator goes up and opens again, push him into the tram.
If you get the famed "Chili Hole Skip" (Master Guns omits the line "so shut your chili hole"), you save about a second. You also get +1000 Hype. TriHard