I would just start at 3-4 iu's ED, and just run that for 2-3 months to see where it gets ya. some people will explode from that amount others will need more, for me personally. I think 4-5 iu's ED is plenty, and im not a big fan of running insulin. I might do slin on my carb up day, but running it ED, just gets more bloated and fat. So I just do it once or twice a week. If I didnt care about getting my bodyfat up, then I would run slin ED, but I need to keep it in check. But, HGH, test prop, and tren ace is a killer combo for sure