yasuo 3rd Q with courage of colossus ?

It's only good on tanksuo, and tanksuo is trash....

maybe if you firstpick yasuo and 3 people pick heavy cc against you , you can pick it then so you arent dead if you cast an ultimate in theyr team but otherwise i dont think its good

If you're top-lane Yasuo and play him like a duelist instead of an AD caster, then it's alirght. Otherwise, just use Fervor. If you need an example of Courage of the colssus in action, watch this: http://plays.tv/s/L238FtHjqm_j (Notice how much damage the shield absorbs)