I believe it is time based. The first time I went through and disabled both chambers I then killed a couple walking armours (that were in my way) before hitting the general with Splitting Arrows, which left a tiny sliver of life left, at which point he ran for the first healing chamber, with subsequent attacks ineffective. I had my back to him for a bit, but when I turned around he was pretty much in the same spot. The next try I jumped over the walking armours (that came up behind me as I pulled the second lever), and was able to easily end the fight (which I did another couple times checking for loot).
Also, if he gets an instant teleport, and protection from further damage once he starts running for a chamber, it doesn't make sense to require an action on general Raze's part to reactivate the chambers.
Raze explaining how to kill Raze, how ironicTry going through the game the first time with a character named Raze and getting to that point...
