Her poison is fine, it's a barrier dependent perk, which most auto-barrier ninja have. i think only onoki doesn't his barrier covers an extra element, so I guess they consider that balanced out.

Her mystery is also fine. It deals rather low damage for its cost even against male ninjas(@ppl crying about onoki mystery damage, it cost 40, what do you expect?). Only if the ignition *s does it actually do above par damage. And since ignition can be cleansed, it's not strictly better than normal. (yes, ignition blocks heal, so in case of heal based cleanse, it's still good. But gakido etc pure cleanse are a thing too and pretty much ruins mei's mystery)

I'd say the only thing overkill about her is the acupuncture. That does feel a bit out of no where. Thou to be fair it frequently doesn't do much--even if it lands, since as an initiator she is usually placed in 1st or second position whereas most team's healer(and thus cleanser) are in 3rd and/or 4th position, it actually rarely *s.

I think it would be fair to replace her normal attack with regular tiajutsu attack,something that generates no debuff and causes low float instead of knockdown. Most kage have a weakness, Onoki doesn't generate debuff except body removal which is useless most of the time. Gaara with his super high cost mystery. Mifune doesn't have a barrier. I think it would be fair if Mei's weakness is that she doesn't chase her own attacks, which is already true for her mystery but she can chase her normal attack right now.

Interrupt is not a debuff, I was careful in my terminology saying no debuff as opposed to no special effects.

And frankly, interrupt on a normal attack is almost guaranteed to be useless in live combat only punishing the laggy and nooby, and only rarely end up being useful in auto-battles. It's honestly one of the most useless effects in the game, so it doesn't really impact the evaluation too much.

As for the tai tag. I know the intend is to nerf that aspect for WATER mains. But it would nerf mei in general as there are ninjas that are immune to ninjtusu damage. As a wind main who uses mei, I feel like collateral damage XD.