Either way, it isnt going to hurt, if you use an AI in PCT, at a low dose. Some cycles will produce higher levels of estrogen, some people may be more sensitive to estrogen and some people may have a harder time recovering, based off of age, genetics or type of gear used. If you're trying to decided to use an AI in PCT or not, I'd just say, go for it. Just keep the dose low. 12.5mg EOD arom will be enough. At the end of the day, PCT seems to be an aspect of cycling that people tend to really over think. For the most part, the same PCT that works for one cycle, is going to work for another. I dont even think it's totally necessary to use higher doses of nolvadex, ie 40mg, in the begining, but I dont think it has negative effects, so I usually suggest it, just to be more aggressive.The biggest difference I've personally seen in PCT, is when I use HCG on cycle at 250iu 2x wk. If I do that through the cycle, I have always recovered faster.