Oh ho ho. After losing my last three spare hats to it, I finally figured out the trick to surviving
RC.9. Just go through the teleporter, then bomb-jump to get back outside so that you're standing in the beam. From there, you can safely kick bombs until all five (FIVE?!

) patrolling saws are frozen in one spot.
Voilà! The Gauntlet of Death becomes the Gauntlet of Cake.

...Seems obvious in retrospect, now that I think of it.
It would be really nice if there was a written guide for Hell levels. Trial and error is all well and good, but it would be nice to learn from someone
else's trial and error.
