Actually the proper dosage would probably be zero. Keep the aromasin on hand and wait to see if u need it. Prop at 350 mg ew with some var will not aromatize into very much estro at all. U'll only need an AI if u're extremely estro sensitive. If u use an AI without needing it u'll minimize ur gains so only use it if it's needed. The right way to go about this is having it on hand but proceeding without using untill a need materializes.