This is bad (testosterone + aromatase = estrogen). Remeber though when coming off a cycle, you own natural test production will be very low so this may not be too much of a problem. Also post-therapy clomid will help to deal with any excess estrogen caused by aromatase. Personally, I like combining 1/2ml femara EOD with 10mg nolvadex ED throughout the cycle to keep both estrogen low and make sure lipid profile does not go to hell.