HGH, tesamorelin and ipamorelin are all good options but don't forget ghrp-2. You can stack all three or all four together if you like. It works really well.
Everybody is going to be a little bit different when it comes to how much fiber they require. Ideally though, you want to get most of your fiber from your food so make sure you are eating your fruits and veggies.
Deca is really good for bulking up. You'll have a big appetite increase. I would do 400 mg and then do 200 mg of testosterone with it. Add some trenbolone and you'll get some good effects.
Ultima has a lot of options. You can go through the list of all their steroids that they have available. My favorite I've ever used from them is their Primo and their Equipoise. Those are really good options.