Why Is Ahri So Strong?
No other champion has a kit that's similar to Ahri's.
She fullfills a niche that's extreemly unique and very difficult to fill with anyone else.
i can't seem to figure out why as whenever i play her i feel like her W is useless and her damage is lack-luster
Her burst is 1154+2.24 @18 with her best-case scenario, which isn't that hard to land with her.
Average burst is ~1000+2.2, so it's not like Ahri is doing less than everyone else, she's capable of unleashing a little more damage than most if she's used optimally.
A solid chunk of that is also true damage from the return orb, making her combo actually much better than what her base values indicate. On that note: her multi-hit combo isn't really impacted by BV, her multi-dash charge isn't hit that hard by MS slows, and her chase capabilities aren't really hit that hard by QSS, making Ahri more resilient to counter-builds than most.
More importantly with Ahri's power though: all the non-damage aspects of Ahri's kit are extremely strong. Her mobility is clearly the best of any mage in the game.
Her single-target CC is also strong, especially considering it can be manipulated to pull targets and cast from an extremely mobile champion.
And her health sustain, while small, is still pretty solid.
Her wave-clear/poke-pattern is also pretty mana-efficient and easy to pull off.
Add everything together and you've got a champion that's got a 5%~10% edge in doing most of the things she needs to.
Her AoE wombo-combo potential isn't as good as most mages, but that's all she really gives up for having a lot of minor advantages everywhere else.