I finished the map with Mik1 on our first try and it was really fun. He managed to find "dodging patterns" (which I obviously copied) for the most of the lasers.

But, I must mention: there IS an invulnerability. It's well placed in a secret in the 2nd map. (as I said, you really need those secrets); though, I used it to tank Jorg and Makron just a bit, which was enough to kill them. The secrets mostly contain a body armor or an adrenaline, which are pretty much what you need.

About the skipping passage: we only took the Railgun, but didn't skip since the map wouldn't be as fun if we did.