AD casters are (mostly) viable right now. AD carries have a static build too but you don't see them saying "we want more items, just because!" --- Bristleback! Boo no BB this round! Fail valve releasing poopdusa over the indefatigueable bristleback surely hes next up - Hail_Berserk
ad casters want to burst, they don't deal sustained damage. introducing spellvamp ad items help ad bruisers more than ad assassin casters.
This. They get plenty of sustain from Lifesteal if they're actually doing sustained damage fights. Otherwise, it's like getting spellvamp on veigar. Sure, it's kinda nice, but it's reaaaally not right. --- Idealism is seeing potential. Pragmatism is seeing consequences.