Kass is pretty easy to counter in lane. His one glaring weakness to his otherwise really good late game
Edit: On that note, not sure how his new ult scaling works for him yet. I haven't done any math on it.
Kassadin is mostly countered by ranged AD midlane. He counters most AP champions with his passive and silence. And once he hits level 6 his opponent is in for a rough time. You riftwalk in, Q, E and walk away. Repeat every 9 seconds. An AP champion opponent can't do anything about it. If they are low enough, riftwalk in, Q, E, W and just melee until dead.
His lategame isn't as good as some other APs. He's an assassin. Needs to hang around the edge of the fight, burst and jump out - wait for cooldowns.
I've seen lots of people say his ult change was a nerf. I can't fathom that. His ult change was a pretty big buff.
Level 6 - straight buff. .5 ratio to .8, same damage
Level 11 - Wash at 66.6 ap (.3x = 20; x=66.6), buff upwards from there
Level 16 - Wash at 133.3 ap (.3x = 40; x=133.3), buff upwards from there
Decent itemization will get you to ~400 AP by level 18.
Old riftwalk 120 base + (400 *.5) = 320 damage
New riftwalk 80 base + (400 *.8) = 400 damage
20% increase. Scary.
edit: well it looks like the stacks on the ult don't scale. So with 400 AP it's a buff until you hit 3 stacks. Then it's less damage. However, from my experience playing him, I don't generally stack ults for damage. Mana costs are too high. By 3 stacks you've used 100+200+300 = 600 mana.
