Amumu

Your pack will tank his Q for you if you don't face check him, and if you are caught out, can use E's dash to avoid Q. Amumu can't go over walls either w/o landing Q on a target, so E over wall should allow you to run away as well. His R will mess you up, just like any assassin, but if you stay clear of his Q's, he shouldn't be able to keep up with you or stop you.

Bel'Veth

She can W your W engage, making her have an easy time countering your all-in, and her mobility makes her able to keep you in skirmishes longer than you might like. Later in the game with more utility, it should be easier to kite her out, but her dps is still a threat

Cho'Gath

He can E+aa through your pack to get to you, which makes him especially good at kiting you down early-game. His silence and knockup can make life pretty difficult. Later in the game make sure to play around vision, because face checking the wrong bush could mean you get one-shot, esp against ap cho

Dr. Mundo

His Q cleaver will hit your pack when you're running away (because the pack follows behind and along side you), so there's not too much threat of him chasing you down, and his CC protection doesn't help against you. However, you can't really kill him either, so prob don't fight him till you've got your core items at least

Ekko

Mostly a skill matchup. Make sure if you do go in on him, that you use E to keep out of his W, and make sure Q2 lands, because it will heal you.

Elise

You can block Elise cocoon with your pack, but she can evade your W. Definitely a skill matchup, with whoever lands the punch first, wins.

Evelynn

Her Q isn't reliable to charm you, so she'd need to be basically melee range to charm with her E. Use Q to bully her when she tries this, and E to space her, she won't be to do much. Your bleed will also keep Evelynn revealed so your pack can keep on her.

Fiddlesticks

Fiddles fear counters your W, so you can mostly never W in. You have no way to stop his drain, and he will drain both you and your pack for lots of healing, which will undo the bleeding you may try to poke him with. Overall, avoid, go around, and try to kill everyone else first

Gragas

His CC and slows are a major problem, and he can R you when you try to channel W to interrupt it. He can go dmg and still heal in fights a good bit, making him a very difficult target to duel.

Graves

Your pack can tank his shots for you. If you cast W as he throws smoke, your W will home in on him, wasting and countering his smoke. Obviously, if you're not careful, he can delete you, especially if you don't have your pack to defend you, but generally you should be able to fight him.

Hecarim

His low cd on Q will shred your pack and his W healing will out sustain you, not to mention he can kite really really well, making him pretty resilient against you.

Ivern

His shields with the slow counter your engage pretty hard, and his poke game is better than yours as well. Once he has daisy, life is pretty miserable, then less miserable with ravenous hydra. Serpent's Fang is definitely the choice, but generally he is quite frustrating to deal with. Abuse your pack to keep him from Q'ing and to keep him using shields on himself over protecting the high priority targets you may want to go for

Jarvan IV

Jax

Karthus

Kayn

Kha'Zix

No isolation when you got the pack!

Kindred

Lee Sin

Lillia

Malphite

Maokai

Master Yi

His Q will bounce on the pack, nerfing his dmg by a good bit

Mordekaiser

Q isolation is nerfed when hitting you and the pack with it

Naafiri

Neeko

Nidalee

Nocturne

Nunu & Willump

Snowball and R are both very dangerous for you.

Olaf

Ornn

Extremely kite-able, and with items, you melt him. Use E to avoid his knockups

Pantheon

His E counters your all-in, so you can't commit to an all-in on him, but he can commit to an all-in on you. You just barely outrange him with Q's, even then, very dangerous to fight him.

Poppy

Counters your dashes (W & E) with her E. She can ult you out of a teamfight.

Qiyana

Quinn

Your W can outplay her Q and E

Rammus

Taunt, taunt, taunt.

Rek'Sai

Rell

Renekton

Rengar

Sejuani

Shaco

Shyvana

Sion

Skarner

Trundle

Depending on what he builds, if tanky, then he's pretty easy, if on-hit, he's pretty scary, but squishy enough to maybe burst. He can pillar to stop the W channel, be wary of that

Udyr

He's usually too tanky to stop most of the game, but he is somewhat kite-able once you have BC and Serylda's due to your Q outranging him

Vi

She can burst you, but you can shred her as well, just be careful

Viego

Volibear

Warwick

His R and fear are pretty tricky to avoid, but with Serylda's, it can be manageable

Wukong

Xin Zhao

Zac