unfortunately yu cannot control profit as ultimately it's luck that determines your outcome.
the most efficient strategy, not one geared at the best player, is to do group demonstration. as it will scout 16 people fopr the price of one. and then you can interview only the 5 and 4 ball prospects.
there is no way to see potentail other than doing scout+interview. and lastly, there is no point to drafting a hof if he is a 3 star level prospect. what good does a hpf 18 year olf w 36 tsp get you (we had one, he was uselss, a full season of training would have gotten him to a level comparable w a 19 year old you can draft or buy for pennies)
that is my take, for waht is worth.