AP need another AP + armor option
i just got off a pbe game vs a full AD team..
and i built
and 
but... ther wasnt ANYTHING more i could build while not completely removing an entire item worth of damage form my build
AD can get

and in theory although less effective 
while it maybe not be effective to build all of those items at once.. you least you CAN as they have no overlapping unique passives
i CAN'T build multiple
to get more armor because of the UNIQUE passive and riot insisting on that passive because so much of the gold cost of said item
and on top of that there is now a RUNE that gives you a
shield...

so ONE of those 6 slots is for 
