The other strat is possible too. I just got it:
You ignore the 3 aquamen, get fire, then kill them - this won't quite get you enough combo. But you can get the rest from the enemies at the spiky ball.
failentin
ohh nice!!
failentin
did you keep it to the elevator?
hesopesomeso
yeah, I had like 30-40% still left, but i fucked the other strat left last guy at one hit
failentin
oh lol but the proof of concept is there then
failentin
now to time if it saves time
hesopesomeso
the thing we should've done first
failentin
not at all
failentin
nah I got a good feeling that it's faster
failentin
hmm although, if you'd normally ignore the three guys at the wheel entirely, it's less clear...