Cull for Scaling and extra Cut Down Damage
Shen's Skill Max Order: Q → E → W
Level 1: Quinn Cheese Level 1 and then auto Shen to death. He still start Q 9 times out of 10, and he is essentially useless because he can't get in range of you. Play your range advantage and don't let him get a grasp proc on you. If he walks towards you, walk back so you essentially stay in your AA range the entire time.
Level 2: Be careful of your E usage because a good Shen will taunt you right after your E is down. Ideally, save E to cancel his taunt level 2 onwards.
Level 3: If Shen uses W, do not Auto attack him because the harrier will be consumed and it won't do any damage to him. Instead, wait for the W to expire before you consume the harrier mark on him.
Level 6+: Your E can cancel Shen taunt, so if he uses it make sure to vault him. However, do not do this when he is Ulting under tower because he can taunt you after under tower and kill you.
So first, Shen's E range is 600, which is 75 longer than our auto range. This is important because if we are autoing shen, he can easily taunt us to retaliate.
The most important rule is to BE CAREFUL when he's under tower because he can taunt you OR flash taunt you, and you will likely die.
First, in lane you can vault aggressively level 1 because Shen has no way to punish you. Level one is yours.
Level 2 onwards, be careful of aggressive vaults because a good shen will taunt you when vault is down and make you cry.
Next, it's important to understand Shen's W. Shen summons a barrier that blocks ALL auto attacks and damage for 1.75 seconds. When this is active, don't attack him and play back.
I recommend, like with Panth E, when your harrier marks him and his shield is up, wait for the shield to expire before consuming the harrier proc on him so the amplified damage isn't wasted, and when his shield goes away, you now have your attack speed steroid and move speed to DPS him.
The cooldown of Shen's W is 18-12 seconds. It is the only win con he has in lane, and if he uses it, immediately punish him for the next 18 seconds.
Don't let him walk up to CS and harrass the living hell out of him.
Play this lane aggressively because Shen can't really out damage you.
For the advanced Quinn players, what I like to do is consume a harrier proc on a minion, and then run towards shen to PRETEND that I'm engaging on him. The Shen will think you are trying to jump on him, and he will use his Taunt towards you, but since you're trying to bait this ability, you run back right away with your enhanced MS from harrier to prevent his taunt from hitting you. By doing this, you now have baited Shen's 18 second taunt AND made him dash towards you.
If shen doesn't land taunt, he is a tanky cannon minion, and you should auto attack him to death.