Fnatic Comp correction and prediction?

Being a plat and a member of this community we obviously know better than a world champ igl.
So for BIND What do you guys think about derke playing yoru and chroni fade instead of skye.For some reason i think this comp might makethem invincible.
Alfa is doing entry and if we can have yoru flash combo with gekko and fade it's scary isn't it?
Also what will be their Abyss comp?

They need viper and brim/omen so double duelist is out of the equation or double initiator is out of the equation

THE MOMENT I SAW CHRONICLE USING NATS' BLUE PRISM PHANTOM I KNEW FNATIC WOULD DESTROY VITALITY