Ladders, 1 rep, rest time it takes to do that rep, do 2, rest how long it took to do 2, same with 3. When form drops of you are either done or you can start over at 1, e.g. 1,2,3,4,5,1,2,3. I would think 3 sets if you get on the higher end, say you can get to 8. 2nd training session I would cut volume back, alternating. Another program is to take your current rep max, add up to 10% or more if you are relatively untrained at the lift. (goal too high is not more effective) double that total. For instance, if you can hit 10, use 11 as goal, and use 22 as your multiplier. do a set of 2 on every minute for 11 sets, (10 minutes). When that gets easy do 3 reps every minute, do 7 or 8 sets. Easy? then sets of 4 for 6 sets. Don’t go to failure. If you can get to 5x5, I’d retest.