I think to win, using the conventional definition, means a heavy occupation of Arabia and Pakistan for 30-50 years, coupled with the overthrow of the Islamic Republic of Iran.
Free Persia would, IMO, be a valuable and necessary ally, along with India.
My 25 divisions would just have been a down payment.
Currently I see neither happening. I do believe that we are currently trying to overthrow the current Iranian government. If we succeed, then we may have dodged a big bullet. If we don't, then we are in deep trouble.