This isn't a direct answer, and I'm not an expert. I would say that increasing your total weekly volume should be one of the last things you should do to increase hypertrophy. Volume itself has pretty drastic diminishing returns, and early on is a good way to push, but it falls off fast for the effort involved. Sets 5-10 do a lot more for you than 11-20 (edited reps-sets).
I would focus on training sufficiently close to failure, them increase your frequency. If you can hit the same muscle 3x a week instead of 1 or 2x, it's going to be a much bigger difference than slamming more reps onto the same workouts.
With that being said, for increasing lifting stamina, I wanted to do it, I would make sure your nutrition is on target and get good rest, then just slowly ramp up the volume and see what you can handle and adjust accordingly.