Your ass will get used to it, I've stopped the ass shots and do quads now, they hurt like I got hit with a golf club the first 2 times by seriously the muscles get used to it, I thought that was bs but its totally true, no problems anymore, ass seems to leave a coin type pocket for a few days but quads are the way, I you have the balls to do it the first time, it was hard but I'm glad I did, only place I'll pin unless I move to a short ester
I think aromasin is the best AI, especially for cycles with higher dosages. But for this cycle I believe that armidex would be a better solution at .5 mg EoD. Not as strong so you won't have to worry about estrogen levels being too low.