Was wondering what would be better, im debating between doing an eco earth layer on bottom with the surface being orchid/Repti bark or instead doing eco earth mixed with topsoil on a 2:1 eco to topsoil ratio.
I'm afraid you're just going to have to try them to see what works best for you and your tortoise.
My preference is straight orchid bark. Second preference is straight cypress mulch. For my baby box turtles, because they like to bury themselves, I use potting soil with a top layer of small orchid bark.