3-4 grams of combined AAS with some GH and Slin is a pretty normal amount for guys who take it seriously.
I've known dozens of guys who have gone over 5 grams a week for extended amounts of time.
I would never recommend using more than a gram a week for the normal lifter, but if you compete at a high level you absolutely are taking at least 3-4 grams a week, with all the other goodies.
His Slin dosage seems quite a bit low to me.