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.
yes evo 110s
That's what I've found too. (although it's been only 2 days) I started 6cm back (about where the nose of my ARES sat) but have went back a full cm almost immediately because I felt very cramped. Even so, I'm still much farther forward than I was on the ARES. Still some adjustments likely to be made, but I suspect it'll go back a touch more before I'm done.