Autistic setup, I guess!
Half this stuff I don't even use. The only issue is - I hate not having it there when I need it.
My policy is usually this: if I use it once every 15 months...I'll keep it.
Regarding my legs - I have absolutely under-trained them over the years. Because I compete in u-80kg Strongman contests [about 175-lb], I generally maintain ok strength - 385x2 below parallel squats / competition form.
My back...that's just genetic though. It sucks.
Do you mind elaborating on your point there?
Do you suppose I could eliminate biceps from back by training biceps to exhaust prior to back training? Even with bad back genetics, I'd be happy to give any tips a shot.
Ass backwards, if you'll pardon the pun

Even if you're using your biceps too much, they're the weak link in pulling and rowing movements. Why make them even weaker?
Try pre-exhaustion. A good pullover machine kicks ass. Lacking one, straight-armed pulldowns can do a fair job of isolating the lats. But the key is form. More on that in a minute.
I feel like the only good muscle group I have is delts... everything else is average of below average. My chest is the worst part [much worse than back. And I've worked my ass off on chest...I hate that my chest doesn't respond.
A. Your pecs aren't all that bad.
B. As I alluded, form, form, form. I've seen footage of you benching. It reminded me of a crazy, if nice, dude, "Walkingbeast," from the old Elite Fitness board. I would talk about my HIT/DC hybrid training and how it worked for me. He respectfully responded that my routine was a "warm-up" for him, a dude used to 30+ sets per body part.
Then he shared clips of his training.
He was strong, but his "sets" of 12 with 275 (or whatever) saw him bouncing the bar off his sternum so hard you could swear you heard bones breaking; combined with doing mostly bottom half reps, the TUT per set was pathetic...12 "reps" in as many seconds?
Of *course* more volume, at least in terms of sets, would be required :/
Incidentally, that's one big issue I have with people comparing volume and HIT, irrespective of how you define the terms in the sense of sets...namely, TUT. The set and rep paradigm is ok for the masses, but when you get down to the brass tacks, it's more complicated.
The only thing I haven't tried to get better pecs is to drop a my solid 5% in body fat. I feel if I could reduce my body fat by 5%, my pecs might show.
I am running the risk of getting flat though. Usually I lose too much muscle when I cut weight.
LASTLY...I have a requisition form for blood work - after that, I would be open to using something.
Even Gaspari SIZEON - excellent product. Not sure how available it is in Canada these days though.
My advice?
Train hard with better form. Lose the brackets when you mean to, or should, use parentheticals.