youre reading from the wrng forum, or wrong posters then. for the ai part, youre probly confused a little. running an ai on cycle could cause more harm than good. andrunning a powerful ai during pct could cause more harm than good. running erase pct is always good.
whoever said cort control = bad is a straight idiot. its definately not needed, but it will help for those harsher or longer cycles. you could skimp on it and save some money. for hdrol, youll most likely keep most or all gains if you use your serm and eat right