what if yasuo's ult increased his flow gain for 15 seconds?
as you all know yasuo was severely nerfed by the triforce change making him have to go glass cannon. to give him tankiness i think that his ult should make his flow grow maybe 1.5 or 2.0x so that he can survive longer. its still gated by ult
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you need no more then 2 crit items to get 100% crit on him and you should be rushing these first if possible. You can then build other items like
(life steal + CC cleanse active + MR),
(all physical damage you deal now heals you and causes a DoT "bleed" effect on yourself to survive burst a little better which givesyou a better chance to survive a fight).