Zenos needed to stay in the elf body during the supposed 6.0 expansion. Explore his background. Maybe he'll learn the value of comraderie or maybe he'll try to exceed the wol without friends.
Fandaniel should've been the one to kill Varis. Possess his body and use Zeno's original body as a prop to enact the successor protocol (my own kin has tried to slay me, bow to your emperor or die). Fandaniel uses the voice of the emperor to temper hardline Garleans.
Thavnair would have called on your assistance to stop the tempered Garleans from stealing their people.
Now we've set the stage for 6.0. Garlemald only exists for Fandaniel. The wol and friends will split into different fronts to combat the tempered.
Oh, and Alisaes method of un-tempering people causes Ga-bu to turn into a Titan-egi. The aetherial composition of a person from the Source is different from that of the First.