I wouldn’t quite have done it this way. Shoulders and chins a mere 48 hours after bench press and pullups. Minimal rest breaks. 3 days of continuous work.
Muscle SIZE imbalance or strength? your a/b choice of deadlifts and extensions would give me trouble. Your overall a/b choices are a little curious. antagonists in areas, agonists in others. Is there a particular reason?
I think you’ll find that supersets are usually done with antagonistic muscle groups.
Eg: bench press (pecs) and bent over rowing (lats).
This can actually allow you to lift more with each of these lifts than if you didn’t superset (lots of reasons I’m not going into).
At the very least you should be supersetting unrelated body parts
Eg: Bench press (pecs) and leg curls (hamstrings). Okay, I hope nobody actually uses that superset but it’s an example.
That way you’ll save time with your workout and keep the HR up a little even if you’re not reaping all the possible benefits.
If you work agonistic or synergistic muscle groups with supersets you’re really doing more of a compound set.
I know that if I tried to superset squats and lunges I would have to take a minimum of 90 seconds after the squats before I would have enough strength and control to safely attempt lunges. Either that or my squats would be nothing more than a warmup.
If I want to superset quads and hams I pretty much have to use machine exercises like:
Narrow stance hack squat (quads)
Leg curls (hams)
I saw your answer. If there is a size imblance, what about the strength ratios? regarding your split, there are as many camps that espouse the higher volume per day/infrequent training approach as there is the lower volume/more frequent training approach. I see pulldown. If there one thing that I can point to when it comes to my upper back development taking off, it would be my renewed interest in chins. How many chins can you do with your bodyweight?