Kass Needs Help
If you've got a low pick-rate (1.43%, which is 35% as high as average mids), you might just be a niche champion, and there's nothing wrong with that. If you've got a low win-rate (44.03%, which is ranked 180 out of the 186 champ+roles that Champ.gg tracks), maybe you're just new and popular, so people are having trouble adjusting to playing you, and there's nothing wrong with that. That said, when you have a terrible pick-rate and a terrible win-rate, you need help.
What kind of help? Well, his identity as an anti-mage is both clear and cool, but at the same time, it needs to be possible to lane against him as a mage without automatically suffering and being crushed for the whole game, so things like increasing his passive magic resistance or the shield on his Q are probably unwise. Since he's also got an identity as a moblie assassin who can't easily 100-0 a squishy, increasing his burst would probably be unhealthy power. I can think of a few things:
- Put an execute on his Nether Blade active (to make him better at finishing low HP targets)
- Increase his defensive base stats (to ease his laning phase and free him to build damage while surviving melee range)
- Increase the ratio on his ult, either with a larger mana-scaling ratio or adding an AP ratio, though I'd prefer the former (to increase late-game damage)
- Give him a small, mana-scaling shield on each Riftwalk that ramps up with Riftwalk stacks (to encourage his extended-engage skirmishing style)
Part of me wants to give him some true damage so he can deal some amount of damage to tanks, but part of me is afraid that will be unhealthy power. I think it's worth a shot, though. Building HP works against him now, and it would continue to work.