You prefer Zenos with or without the Helmet

[Enkidoh]

Beheaded mostly

^ This.

The Warrior of Light should have been wiser than that to just assume he was dead and actually made sure of that (my headcanon Enki would have beheaded him with a simply a quick downward thrust of Curtana as he lay there... but alas..).

And I can even picture the line to go with it:

(Zenos has just apparently committed suicide as Raubahn rushes in)
Raubahn: "Where is he?"
Alphinaud: "He's dead. By his own hand."
Enki: (eyes narrowed) "Wait! We better check for a pulse though..."
(Draws Curtana and then thrusts down, decapitating him in one stroke)
Enki: "No pulse..."

Yes I know I kinda ripped off Pacific Rim with that...