I've never choreographed a routine, but I do a lot of freestyle and have worked out some combos.
Brass Monkey - My novice-level teacher recently showed me how you can go from a brass monkey directly into a Remi sit, which I thought was pretty cool (but will be torture on your ankles if you aren't used to the Remi). Lift your upper body, hook the knee of your outside leg around the ankle of your inside leg and hook your outside ankle around the pole. Remi! Totally blew my mind, I never connected that before.
I like to go from a brass monkey into a brass bridge, or I also like to go into a brass monkey split that my acro instructor showed me: grab onto the pole (outside hand just above your inside leg, inside hand pretty much just below your butt), extend your inside (hooked) leg up and your outside (unhooked) leg down. I don't know if I'm explaining this very well, but I can't find any videos showing what I want to describe =/
I would do Janeiro if I had it, but I'm still working on that one.
Gemini - My favorite thing ever to do from a Gemini is go into a Jade and then drop. You have to make sure you're high up enough to do this, though, someone in my studio recently got injured doing a Jade drop too far down the pole o.o
I also like to go Gemini -> hip flip -> Superman, and recently, into a Titanic from there. I don't really know pretty ways out of Superman other than Superman -> Titanic -> shoulder mount, though. Maybe a Superman drop if you have one?