I can get P.A 5 Alpha to run via fastbooting the system img, boot img, and userdata img (Seraph's Creations) but it is still in alpha so its not much use.
I tried side loading "falcon_KXB21.14-L1.57_kernel.zip - Stock 4.4.4 kernel" and "Deodexed, debloated, and rooted Stock KXB21.14-L1.57...