Well if you're off cycle, then taking an AI may not be needed, and may do more harm than good anyway. If you're off cycle, and you were getting gyno symptoms, then yes I would take the AI.
Finasteride reduces conversion to DHT.
DHT activates the androgen receptor better than test.
But little is known that DHT is necesary for anabolism, because of this there are no -and never will be- steroids without some androgenic effect.
Steroids which bind poorly to the androgen receptor, i.e. dbol, adrol, arent as powerful by themselves, must be combined with some that bind strongly to the a-r.
Add in mast and call me in a week...lol I kid. perhaps a half an mg of adex eod would help if your est is high and/or you're retaining water. You won't know without bloods.