This sounds like a horrific combination. Nutmeg apparently lasts a very long time too, by the time the LSA and DXM wears off, you will be left with the nasty nutmeg high, I imagine it would feel as if you suddenly hit a terrible comedown.
Also, nutmeg is a deliriant, right? Wouldn't that be possibly risky mixing with a psychedelic and a dissociative (maybe not for your health, but possibly from whatever actions you might decide to do in such a state)?