I'd like to hear people's opinion's on lifting to increase muscle size? I'm currently doing the 531 program which is increasing my strength nicely, but I would like to increase my weight as fast as possible. My thought was to just add a bunch of volume onto my current program and do some of each.

I am currently 5'8", 163 lbs with visible abs. BP 280, DL 358, Squat 327, OHP 144

If you are not big I don't care about your opinion.

FWIW I'm on TRT, but just running a normal does until after my physical in January.