At LoW 2 all the camos seemed to work the same to me... Multicam blended fairly well with the bushes at a distance, but at the rest of Warpaint outdoor I think that there are so many obstacles that camo doesn't matter.
But pertaining to the actual discussion... Marpat is probably the best for here (as you said, Catch.) But chest rigs don't seem to matter depending on color. The only combo I can see actually affecting blending in is Marpat+Tan gear. But I know the community has a lot more experience with that than I do.