People have different ideas/protocols, no right or wrong answers sometimes
I would only consider insulin for growth phase when you have maxed out size wise on anabolics.
GH alone in low doses is fine, the problems can start if it is used in higher doses consistently, every day for long periods of time. I would recommend 8 weeks on and then a break. Maybe take some time off (1-2 wks) midway through prep and rely on a fat burner before going back on until the last 2 weeks, when it should be removed so you can really see your condition as the water comes off.
Experiment with the GH timing. If you take it pre bed, when it peaks 3 hrs later you may wake up very hungry and have trouble with sleep. This is my experience anyway.
First thing is an ideal time to take, especially on a diet. I do 20-30 mins of cardio upon waking after a litre of water, then GH shot, then breakfast.
The cartridge is double ended(dry powder in one end, 1ml of water in the other).I use a regular pin to inject the water slowly down the side of the cartridge. Do not inject directly onto the powder. GH is fragile once reconstituted. Once the water is in slowly rotate the cartridge until the powder has dissolved. Be gentle when handling it & keep it in the fridge.
You will need to purchase insulin syringes to inject(5 units on the syringe is 2.25 iu's of GH). I alternate side delts towards the bottom of the head.
Diet looks good
JP