Hey brother, good questions. The big question would be how many days you would have between to wait between injections. You could do a nice little cycle, while only injecting long acting gear 1x wk. You can even use Test undecanoate less often. I beleive that for TRT, its injected 1 a month. So do some reading about ester length and get an idea of what might work. Feel free to come back and ask about this again, letting me know how long you would have to wait between shots.
As for orals for mass, dbol would be my suggestion. If you run it along, I would set the cycle up like this :
wk 1-6
Dbol 30-40mg ED, split into 2-3 doses
adex, .5mg 2x wk to EOD as needed
Right after your cycle, PCT starts the next day, Clomid 100mg ED for 1 wk. Then 2 more wks at 50mg. You can add 50mg proviron in during the cycle, if you want to get a harder look and increase libido
As for your size, we are all dealt a different hand. Some better than others. For a lot of guys your size, it comes down to doing all the right stuff, for a long consistent period of time. If 4000 cals isn't doing it, then maybe you need 5000 cals, or maybe your macros were off. Its not just about total cals, but about your macros and food timing. With or without gear, you will be limited by your diet, so "eat big to grow big". I have a client that had your exact stats at 30 years old. 7-8 years later, he is about 200 lbs at 3% on stage. So it can be done buddy. It's just a matter of knowing what your body needs.