>>718940294
That's my point though. By the time you reach it, every other boss, even NKG should be very easy and you don't even need to play perfectly because you have a bench (again lifeblood not withstanding).
Considering it takes ~40 minutes to play through all of the bosses, there's no way you're going to play through the entire gauntlet over and over again just to ATTEMPT PV+AH.
Like >>718940615
said, the only feasible way to do it is to simply practice PV and AH on their own until you can do them consistently and easily.
At that point, the gauntlet is really moot. It's too long to even consider trying to do PV+AH before you know them so well that it's a guaranteed win.