I second what jipped said. If you're just trying to get your test levels back up, then I would keep it low at a typical TRT dosage. Honestly, since you've been out of the game for so long and your testosterone levels are low, you probably don't need anything other than low dose test at this point to see some good gains. You'd probably be pretty happy adding in a low dose test enan or cyp and bumping up your macros a little.