Do you still need to double cleanse [using an oil make up remover before this] with this?

I do, absolutely. However! I would also say it depends on how much makeup you're wearing that day. If you went strictly skincare routine that day, I would say you can just use this, as double cleansing at that point would just be stripping your skin. This is how I go about it, and it seems to work great for me. I also have normal to combo skin, though, so I'm not sure if that is something to consider as well.