Hello gap,
if I am right, one of your questions remained unanswered.
I think, SH3 supports ambient occlusion OR normal/bump maps. There are some models with either ambient occlusion or normal channels but I am not aware of any with both ambient occlusion AND nomal maps. Some have ambinet occlusion and bump maps.
My suggestion, do only an ambient occlusion map. It works reasonably well.
Cheers
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