I can’t give you cup measurements but I use a mixture of perlite, happy frog and peat.
I fill about 1/2-3/4 the container with happy frog, 1/4 with peat and 1/8-1/4 with perlite. You could use the same mixture and lose 1/4 of the happy frog for the coco coir.
I mix it all together evenly, I don’t layer. Sometimes I add a little perlite on top though. I also use the fox farm dirty dozen with my plants. Don’t use heavy doses of nutrients for the first 3-4 weeks after transplanting since the hp already has some nutrients in it.