I use mostly 3-4iu ED. Just got back on 4iu. Was off for 8 weeks but before that on for a year.
Goal is a bit of enhancement but I'll be honest, I'm late 40s. Didn't even notice not being on/off. Top provider, tested, IGF1 bloods nice and high, where it should be and way above my baseline. Doesn't help my rest, sleep, recovery, skin etc. Or anything I'd really notice. Maybe I have decent genetics. Does let me be a bit looser with diet. I do take some metformin as fasting glucose rises a bit and for other reasons.
I get 100x more mileage out of AAS. Mental masturbation and pondering ifs is fun but work and diet over time with some AAS gets it done. GH may provide a bit above that esp high dose with slin for someone nearly topped out but your time and energy is best spent on the big blocks until closing in on that point esp given the cost/benefit.
My 2 cents.