Mr. Root, first off, is DOC referring to 2,5-Dimethoxy-4-chloroamphetamine?
Let's just roll with that situation why not. There just isn't going to be a lot of information regarding the danger of this combination. I really want to say that this is probably not. People or at least one person appears to have died solely by the effects of DOC. Are you familiar with this substance in terms of actual use. I have to admit that I've never heard of it specifically until now, but it tends to produce very strong effects even slightly above the threshold dose, which is a pretty unique characteristic of drugs, at least concerning the one's I'm familiar with.
I would personally only use them separately.