Fucking mindblowing combination, but definately not for everybody! Which is your favorite to combine? I think mine would be 2CB as it's nice and trippy and shorter lasting than many of the others, so you can re-dose them both together easier.
I think you'll find that you're in the minority on this one. I myself have never even seen, been offered, or asked anyone to supply ketamine, much less considered combining them with rcs... What ya do, raid a veterinary clinic (part joking, mostly serious)?