exemestane/aromasin is fine to use during PCT.. Clomiphene is the preferred PCT drug where there is significant suppression.
there is a lot of good anecdotal feedback on exemestane and clomiphene based PCT. with exemestane also offsetting some of the negative sides associated with clomiphene (which are in part due estrogen conversion from the increasing testosterone production)
exemestane alone run through cycle (which will minimize on cycle suppression in test only cycles) and beyond may be sufficient as PCT. since suppression will be minimized, though in high DHT converters suppression can still be significant***.
but even with test only still reccomend clomiphene be run post cycle.
as a note- DO NOT FRONTLOAD CLOMIPHENE. not only is it uneccesary, it significantly increases sides. 50mg/day max. where suppression is mild to moderate.. 25mg/day is generally sufficient 2-3 weeks.
***particularly in those with 3b-hsd genetic or other elevations. (tending toward very masculine(DHT)- body hair, muscle hardness, etc with limited- generally tissue specific- but exceptionally feminine (ER-activations) expressions puffy nipples, emotive memory, anger/depression)