Hard nipples are tight, and compact.
Gyno should make nipples "girly" and puffy. Very sensitive and easily irritated.
If you are not painful to the touch or puffy --- I'd rather you just resume cycle without using an AI, since you want to make the most of your cycle gains.
If you still wanted aromatase inhibition to keep bloat under control and a tighter look, plus estrog control, I'd recommend a DHT based androgen instead of an AI. This way you wont lower igf-1 levels and take away from muscle gains.
Proviron, masteron, stanolone enanthate. If you cannot access those -- high dose Epi/Androsterone is very good --AndroHard product.