Honestly I never checked the wildnerness after realizing that harmonized provides a unified bonus. I'll just test the wilderness wandering and see if affinity increases.
Mono Outer: Doesn't not do it, or its very slow. Didn't see any gain in 500 years
Mono Inner: Wandering does not increase affinity. same as above
Dual Outer: Wandering does increase it but at horrible rates, harmonized settlement is superior.
Dual Inner : Marginally better than Outer
Mono Deep: Same Pace as Inner/Outer.
I agree with your wilderness findings, they are most definitely broken because I remember getting far better returns from wilderness for affinity gains. I also am not sure if this is because I'm band 17