I don't want to be rude but I'd be careful with overthinking this "affiliate expertise." Advertisers are generally (with very few exceptions) on one network only. So if you want Apple, they're on Linkshare. If you want Shutterfly, they are on CJ. That's why I would say, if possible, a solution like SkimLinks or ViglLink would simplify your world immensely.
I don't know what "a perspective on which programs to consider and why?" actually means. That seems dictated by his business model and what affiliate programs he wants, not by his choice. I.e. You're not going to get Apple on CJ just because you think CJ is a better affiliate tech platform.