Question: What types of abilities can akali get hit by in her W?
Tittle. When she is hid on her W what can hit her?
Tittle. When she is hid on her W what can hit her?
prob aoe skills and every skillshot
Can sivir's Q for example hit her?
Yes
Any ability that can be ground targeted.
Can hit her:


Cannot hit her:
unless the AoE hits from targeting something else 
unless ult dies
pillar only does 1 damage
unless he has other targets with pheonix 
So, only targets can not hit her? Everything that isnt target can?
That is correct. Think of it as she went into a big bush that you can't ward.