The only AI you can run in pct is aromasin cause its suicidal. Dont believe whatever you read on google though. If you have been running adex/letro on cycle and you go 25mg ed on aromasin for your pct you will crash your e2 hard. If you didn't run any AI while ON then you need to run aromasin on pct at 25mg ed along with nolva which most aromasin/nolva pct protocols suggest. If you did run an AI on your cycle then the most aromasin you should need for pct is 6.25mg-12.5mg eod/e2d along nolva. No point in running any of the other AI's for pct since you are going to rebound when you stop them and you will have to run nolva again even if you finished pct. Adex/letro are counterproductive for pct aromasin is the only choice. Personally i would stop aromasin around a week after the nolva/clomid