There!

Back to the oval-shaped world div. This is divided into an octagon, an eight-sided polygon, but we can make this any number we want, within reason!
The poles need to be at least a three triangle fan, but four or five would be better. We can subdivide the eight triangles six ways and make a pair of polar quad/triangle fans, conveniently enough, and we will want to do this, after we add height values to each of these six inital points (the three to the left and right on the seam of my world peach wrap around). The triangles then tend to subdivide along the coast line a zero height or sea level.
(This is using some old code for now to make triangle fan landmass)