“You can poke him hard early laning-phase since he is immobile. If he runs electrocute be careful of his all in damage with ignite. Your wave-clearing is way superior so use that to your advantage to dodge him after level 6 and try to pressure the jungle and other lanes with your team. Later in the game you can try to keep him in place whenever he tries to go for your team, that'll allow your team to potentially cc or kill him. After level 6 you won't be able to do anything to him anymore.”
“ The second easiest matchup for Tryndamere. Pre 6 if he ever tries to go for CS you get a slow and either burn flash or kill him. The only way you lose this matchup is if he takes grasp and you let him trade with you freely to the point where you can't all in him. Expect a lot of jungler assistance for Kassadin in this matchup. ”
“MELEE = PUSH EARLY (LEVELS 1-2) - CARE FOR GANKS! (SPAM Q'S TILL 50-60% MANA) - Corrupting + maybe a Doran if you struggle.
If possible spam Q from a longer range and try to send him to base before 6. Post 6 there is no reason to fight him unless you have a hard CC such as Skarner because he will always escape with blinks or even kill you. Kassadin is a good counter to Taliyah because if he does not have cooldown on teleport he can easily follow you bot so try to roam only when you know his teleport is not up. Kassadin usefulness starts only at about level 11 and two items, so try to abuse early as much as you can and perhaps tell your team that too.
Beware of the teleport. Most Kassadin players will go for TP and will try to bait you into using all your skills and missing them so that you need to recall. Whenever you can try to go for all-ins because if you don't get a kill the enemy Kassadin will just gain advantage from the TP, so engage smart.”
“Winning this matchup will require coordination with your jungler, and great vision control because you have to push the wave into his turret to punish him, so the enemy jungler most likely look for ganks. A good kassadin won't push the wave against you, so you can't really freeze.
His Q gives him a temporary magic shield, so when trading, wait until the shield expires, and then use your abilities. His Q is a single-target spell so the minions will aggro him when he's using it. If you have a stacked wave by slow pushing, he will take a lot of damage from the minions.
Spam auto attacks and zone him from waves with your ball. He's a melee champion so you can punish him pretty hard if he walks up to cs. People usually greed for cannon minions.
If you have teleport, you can apply constant pressure and match his teleport.
He obviously outscales you, so you want to try and close out the game before he hits the lvl 16 elospike. That means not giving him any advantages (dying to enemy jungle gank for example)
What happens after lvl 16 entirely depends on the teamcomps. Orianna is also strong lategame so you have to play around your teams wincondition (splitpushing, teamfighting, sieging etc).
Even if kassadin is at god-level after 16, he can still be shut down with the right teamcomps, so don't give up even if you reach lategame.
“Even though Kassadin is a amazing an denying certain AP champs, syndra can work past that. Never let him walk him to Q you, and as Syndra you should always be poking him when his Q is down so he can't shield your damage, don't forget to keep auto'ing him pre-6 too.”
“Once that clock hits 30 minutes, you lose. He jumps on top of you and you die. Build aggressive and encourage your team to end before 30.”
“His Q shield and his passive make it hard for you to ever kill him, even if you manage to cc him for once. He will also outscale you most of the time and you can't really do anything about it.”
“ He out trades you every stage of the game, out scales you, and can dodge all your daggers with his R. He also has a silence that cancels your ult and builds Seraph’s so he can negate all your damage with a shield. (Rush Bilgewater Cutlass since he is prone to AD damage)
“The reason kassadin is a major threat is not because he will kill you in lane but because twisted fate is not the right champion to punish his scaling. Meaning a good kassadin can free scale against in this matchup.”
“Against Electrocute Kassadin, stick to very simple combos and try to avoid his W. At level 6, just buy a Null-Magic Mantle and keep trading with him as long as possible since his sustained damage is low. Take the Standard page and MR.”