Use this one its stable its based on the pure aosp tree too
http://xdaforums.com/xperia-z2/orig-development/aosp-6-0-marshmallow-sony-xperia-z2-t3235951
Why is there no recovery so far?
fastboot flash userdata userdata.img
fastboot flash system system.img
fastboot flash boot boot.img
fastboot reboot