What 5* rank up? (Champion w/Armour Buff)

I need in this moment a champion with armour buff in my rooster. I am not sure about this 3 champions. In 2 weeks I have ranking materials. I am more inclined to Colossus, but idk, should I go one of this or wait ?
(I will start doing act 6 and variants. And continue play wars and map 5/6)