I'm all for mixing drugs, and if you dig dxm then go for it. I'm of the opinion that dxm, while a legitimate psychedelic/dissociative is just not a very enjoyable trip- that's just my opinion. If I had some lsd I wouldn't mix it with dxm- now if you had some molly, 2cb, shrooms, or an x pill, I'd say fuck yea mix all that up and blast off.

My issue w dxm beyond personal preference is that there isn't a lot of knowledge about high doses and long term effects. But if you were to combine the two I'd drop the acid after the dxm started to come on pretty heavy, mostly because I wouldn't want to be coming down on acid while the dxm could still be going; your call there though.

Maybe the folks at r/dxm have some more experience