Here's the thing with hiring assistant coaches. As with any sport, the best ones almost always come from the same coaching trees. In the NFL, you were much more successful hiring a disciple from Bill Parcells or Bill Walsh than Bill Belichick (proven many times over). Which college hoops head coaches have produced the best coaches from their "coaching tree?" For example, no assistant got more notoriety than a "Coach K assistant"...but his assistants were mediocre time and time again as head coaches whereas Dean Smith produced the likes of Roy Williams and Larry Brown. When he was at OU, Kelvin had 3-4 assistants get coaching jobs - all with disastrous results. I honestly don't know the best ones in today's world, though Rick Pitino has a pretty good track record.