I transfer stuff to 3dcoat alot. I go high poly with divide larger than/all option Michael points to... like 200,000-400,000

Then in 3dcoat i can "autopo" for a down and dirty all quad. Then of course, retopo if you need perfection....

But i have never gotten more tris than quads in MoI's mesher.... but, i havent found a poly app that handles ngons well either.

But, since you are going to 3dcoat as "surfaces" which doesn't need solids and volumes, try ngons and untick welding edges and vertices... or even separate the model in MoI and export ngons from the unjoined surfaces.