In fact, I'd strongly suspect that there will be a trend towards more Tokugawa-style dispassionate choosing of non-monogamous partners for political, economic, and hereditary reasons going forwards. It still will be a small minority of the population, but probably a larger small minority than now. And it probably doesn't make sense to add that in with any "-amory" grouping, being that those arrangements are chosen not for the warmth and connection, but for other reasons.

This was rather surprising for me to read, since after some thought I realized that I may be pretty close to this style, since I use some of the criteria you mentioned for screening and am not currently monogamous.

I find your speculation intriguing. I could imagine strategies like that becoming more widespread due to different tactics people will use to deal with the sexual marketplace. Greater knowledge of heredity, and perhaps even its acceptance, will mean that those hoping for upward social mobility will need to think long and hard about the lifestyle and mates that will be best for achieving their goals. Also I expect that some strategies will gain simply because children will tend to emulate parents, but in which way this will be working will depend on their fertility.