Illaoi has more damage than APC's and ADC's (according to charts)
they played her tanky at competetive arena and look at this ,
http://www.gamesoflegends.com/champion/picksandbans.php?season=S6&split=Summer
she is on the 9. rank (damage per minute). Mainly first 30-40 is adc's and apc's. Because they are CARRIES WITH HIGH DAMAGE BUT LOW HP. You mad? if someone plays her full ad then you are idiot, I believe pros build her tanky and got that damage. Its just ridicilous man. Really. Don't tell me "Because she is tanky man" or "She has 0 mobility this is why". I never seen a tanky champ is on the first ranks. Second another tanky damage dealer is olaf and he is at 38. rank.