This Start forextra Cut Down Damage
Tahm's Skill Max Order: Q → W → E
Level 1: When Tahm uses Q on you, stand behind minions to avoid his poke. Trade with him whenever you can, you hard win early.
Level 2: Tahm's new kit is scary. He can go in the ground and jump out at you to knock you up. Try to save E for this, when he comes out use E to escape with ease, and then kite him afterwards
Level 3: Tahm's E doesn't really do much in lane. Play the early game extremely aggressive and try to only go for fights when your Phase Rush is up. Stand behind minions so he doesn't get free Q poke on you.
Level 6+: This is when he is scary because he can devour you. He can't one shot you, so save E for when he jumps at you and then you will be okay!
Literally all you need to know is that if Tahm Q slows you, AA-E-AA to proc phase rush. This means he cant walk up to hit you with W, ever.
Stand behind minions, and if he Q slows you, use phase rush to escape. He relies on this slow to use W on you, which is all of his damage.
If you go even in this lane then it is a win for you becasue Tahm relies on getting ahead to do anything in this matchup.