I'm guessing old oracles won't work anymore on her.
But what about things like 
Shrooms with 
.
Will the health burn tick prevent her from going back into stealth?
What interactions interrupt it. Or is it like a perfect Yasuo ult or Fiora W, w/ no skill as you don't need timing?
AOE and skill shots would still hurt her, even if she's still stealthed. Maybe a hooking champ like Blitz can even pull her out if they aim well.
Reminds me of a scenario. We had won a team fight and were going mid, I popped my 
and found their Teemo was standing in the one spot stealthed. Sure, we couldn't target him, but it didn't spot us all from just murdering the invisible hairball anyway.
she is stealthed, not invincible. She can still take damage, be CC'd, etc. You just can't "target" her, but she isn't "untargetable" in the sense that she cannot take dmg, like Fizz E, Zhonya's. Anivia ult or maybe even Wall to "push" her out of her smoke to see her. Lissandra W/R should work well vs her. Poppy W may be good since Akali's E and R are dashes. I'm not sure but I think Lee Sin Q and Karma W might reveal her position (tho she can't be targeted by spells/AAs). You can always play a champ that has stealth/untargetability/mobilty like Zed, Talon and Fizz. Malz doesn't sound like a bad pick either with his ult. You can also play a champ that has a displacement abilities to keep her out of her W.
Veigars cage
