I wouldn't use HCG during TRT, it increases estrogen. Stick to straight testosterone enanthate 200mgs/week, add osta 25mgs/ed.
Research:
https://www.isarms.com/ostarine-mk-2866
If you're on a cycle now already, why switch? Increase your caloric intake and your protein intake, then you'll grow.
Research:
https://www.isarms.com/sustanon-250
Cardarine and Nutrobal don't have estrogen symptoms; in fact, cardarine is non-hormonal. You should use aromasin 10mgs ED until gyno goes away.
Research:
https://www.isarms.com/cardarine-gw-501516
https://www.isarms.com/nutrobal-mk-677
If you stay on TRT or even self administered TRT, there is no need to discuss PCT at all. You can just use HCGenerate on and off. How long is your planned cycle?
If you stack Andarine with anabolicum (lgd), you can keep the andarine dose the same. The lgd will just boost results.
Research:
https://www.isarms.com/anabolicum-lgd-4033