Torso/head/hands all look good. Are those the Zipp Evo extensions?
I've also been trying to figure out the right position for a Mystica. Conventional wisdom (especially in places like SlowTwitch) is to put the saddle as far forward as you can, but even at 5cm setback I found myself constantly scootching back on the saddle. Currently have the saddle nose 7.5cm behind the bottom bracket which sounds extreme, but it feels good and has mostly solved the scootching problem.