Most efficent Azir build: Thunderlord's Decree vs Fervor of Battle vs Deathfire Grasp
I've tried Azir with all these three and I honestly have a little difficulty telling due to several things. Obviously, Thunderlord's is for the early game, whereas deathfire is for the late game and Fervor of Battle is pretty much for all the game. I seriously wonder though.
While each of these keystones are good for certain situations, which exactly is the most efficient? I want to say Fervor of Battle, because it's effective throughout the entirety of the game, but Deathfire is definitely better for lategame then thunderlords, which eventually falls off in terms of damage.
So for any serious Azir mains. Which is honestly the best one overall for him?