HIT certainly works GREAT for mass. When I changed to HIT, many years ago, using the same gear and eating the same as before (so the training was the only change) I gained 57lbs in 4months. Been training like that ever since in the off season.
I train Mon, Wed and Fri only.
Mon - Chest/Shoulders/Triceps
*Incline press - warmup sets, one set to failure
*Flat flyes - one set to failure
*Millitary press - one warmup set, one set to failure
*Rear delt machine - one set to failure
*Seated machine press(facing the back support) - one set to failure
*Tricep pushdown - one warmup, one set to failure
*Nose breakers - one set to failure
Optional - *Rope pushdowns - one set to failure
Wed - Quads, Hams, Calves
*Squats - warmups, one set to failure, one pump set of 20
*Leg extension - one set to failure
*Lying leg curl - one warmp-up, one set to failure
*Stiff leg deadlift - stretching, one set to failure
*Standing Calf raise - one warmup, one set to failure
Fri - Abs, Back, Biceps
*Rope crunches - one warmp up, one set to failure
*Lat pulldowns - warmups, one set to failure
*Deadlift - one warmup set, one set to failure
*Bentover rows - one set to failure
*Shrugs - one set to failure
*Standing BB curls - one warmp up, one set to failure
*Preacher curl or Alt DB curl or Hammer curl - one set to failure
I do lots of warmp sets for the first exercise - eg Incline press - if your max failure set is with 3 plates, then do 2 warm ups with the bar, 2 warmp ups with 1 plate, 1 warm up wth 2 plates and then the work/failure set with 3 plates. Then when you move to flat flyes you do the work set straig away as your chest is fully warmed up after it failed on Incline Presses. Then just one warm up set for the next bodypart to get used to the new range of motion and the work sets begin.
Work set means 100% effort, 100% PHYSICAL failure not mental!
I take PLENTY of rest between work sets - 5min.
Getting ready for a comp though, I train 6 days a week, twice a day plus cardio daily. The aim is to lose bf not to gain size.