Analyzing assistant coaching hires is really, really hard. Hard enough that I actively question the value of even attempting the task. The reasons are obvious. Each team has three assistant coaches, and what they are asked to do can vary widely and without any obvious explanation. At least football assistants come with a more specific title, so that you can attempt to analyze the performance of a position group.
Some basketball coaches are recruiting specialists. Some are defensive specialists. Some are jacks-of-all-trades. But unless guys are coaching at really prominent programs, finding out who is what is hard, if not impossible.