So I was following some chinese sculpting tutorial and while they paint in blender every undo I do takes about 5 seconds so that's a pain. I do have substance painter but it tells me this:

"Failed to compute tangents, need UV data in channel0"

The whole model is now at 12,6m tris, and I'm not sure how to proceed from here at this point.

I really want to finish this since it took quite a while to this point but just vertex painting it in blender honestly seems impossible.