I wouldn't run a SERM if it wasn't necessary as part if a PCT IMO, but an AI can have a variety if uses solo.
Towards the end of a cut it is great to drop final buts of weight and water weight to really bring out definition and vascularity, also as you are decreasing E you will get a resulting higher free T ratio, which is never a bad thing.
Just be sure not to overdo it as we don't want too much E suppression
An OTC AI would be all that is needed, topical Form being my preference
BLR's Formestane or IronFlex's Formabolic are very well reviewed products, and both available at Orbit where you can use the code SOCIAL for 10% off