Okay, from what I understand:
If you are on ZV8 and want to use ZVA: Flash ROM Gapps, and Kernel. Verify that it boots, then go to recovery and flash ZVA.
If you are on ZVA already: Flash ROM, gapps, and Furnace kernel. DO NOT FORGET THE KERNEL.
Phone: Google Nexus 5 "hammerhead" ROM: LiquidSmooth F2FS Kernel: ElementalX 1.00
Tablet: Amazon Kindle Fire (Gen 1) "otterx" ROM: CM11-F2FS by Hashcode
Tablet: Google Nexus 10 "manta" ROM: LiquidSmooth F2FS-All Kernel: KT-Manta F2FS-All
Retired: Sprint Motorola Photon 4G "sunfire", Sprint LG G2 "LS980"