It might seem like a joke but I just found out that ad janna cnters the hell of ad sion .
U might ask how .
It requires a good janna player and good technique but with good use of q w of janna it is quite easy to coutner sion .
I have bouild of : phantom dancers , beserker boots , black cleaver , manamule bloodthirster and ie .
The fn thing is that sion doesnt manage to catch us to use lifesteal from his ultimate as janna ( esspecially with speed buff on 3v3 ) if way faaster than him and even if he stuns us he doesnt manage to land more than 2 hits before u throw him up in air and slow in and deal "tones of dammage"