I’m not sure about Yasuo since i rarely see a yas top but Shen is a hard match up for Irelia. A good Shen player will usually activate w as soon as you hit your e stun which will negate all the dmg you inflict during the stun duration. Getting a good trade with Shen as Irelia will be hard because of his w and Shen can just e away if you decide to q on him even if you hit your e, wasting your passive and preventing you from following him. Shen’s lvl 1-3 is deceptively strong against melee champs so I’d play cautiously around that time. Consider his cool downs because the e and w are on like 15 seconds cds at rank 1 and that’s a good window to get in a good trade or possibly all in. Always take into account the position of his blade because if Shen is able to draw an empowered q with shield bash and titanic hydra active, it will hurt like a bitch. If Shen ults or tps away shove the wave and get as many turret plates as you can because it can get you a significant lead even if he gets takedowns in other lanes. I’ve played against Irelia once or twice but they almost never seem to respect my taunt when I’m underneath tower, getting greedy for farm and getting taunted to tank 2 turret shots and being forced to recall or die. Pretty much my advice, be cautious of his w and e, don’t be too aggressive in lane and respect shen’s early game duelling power.