Yeah, I figured K combines well with any psychedelic. I still know my shit eventhough I've been out of the drug taking business for some time now. :D
Besides that, I should add a bit of info on my 2C-D experience, since it's gotten mostly positve "reviews" here. It was the opposite of exciting. It started off with 20mg 2C-D rectally if I remember right (might have been a bit less, don't take these dosages for granted you know how the mind often distorts and exaggerates things over time).
What followed was a quite unpleasant bodyload with hypertension of the sceletal muscles, especially in my back and neck, no visuals whatsoever, an elevated heart rate and elevated blood pressure. Think of amphetamine with a minimal (!) psychedelic tilt to it.
So in order to trip properly that night, I got the 4-AcO-MiPT out of the safe and started snorting it in unknown dosages (probably ended up with about 40mg at the most).
I now had some slight emotional insights, visual distortion going on, nothing spectacular though. And the bodyload was kicked up a notch.
So this whole thing turnt into something I'd have rather aborted then carried through with. But the urge to have a proper trip remained, so I administered 400 or 500mg racemic Ketamine rectally.
It turnt out to be a relatively colorful ride (while rectal ketamine administration usually resembles more of a dulled out narcotic state for me, opposed to intramuscular administration), but still nothing spectacular and sure nothing I'd have remembered if it wasn't for the fact that after that night I felt like an out-of-control junky boy.
Maybe it was just set and setting, I wasn't in balance with myself those days (still ain't, but who can really say he is...), spending my time at home alone watching movies that night (up to the point where the Ketamine was taken that is).
Anyway, I never felt the urge to repeat a high dose of 2C-D since even if the positive aspects would have been more profound, the side effects (body load) were a bit too much for me (and this coming from a guy who enjoys dpt trembles tremendously

). I think I had taken 2C-D a few times before that at lower doses and it was basically just an experimental stimulant (and therefor less attractive than amphetamine for example)...
EDIT: Ha, there's actually a video of me plugging the 2c-d floating around on the net somewhere which a few guys from my town who know me pretty well recently discovered. This brought a somewhat questionable fame I suppose.