Then what AP will i get if there is a Vlad, Mord, Akali, Mundo, Garen, Voli, Galio, Fiddle and literally anyone who has self heal...or uses spell vamp...or uses life steal. They actually need to add in a new AD item that has it so you can deal with your enemies' self heals when your team is mainly AD.
Hourglass is the counter to AD assassins, and any high burst
Void Staff is the counter to anyone who builds MR
Liandry's is the counter to anyone building health
DFG was the counter to anyone that is still alive (RIP DFG)
Perhaps the healing reduction could be reduced (20/30% instead of 40%), but i do believe the item is needed in the league.