Why? Doesn't matter to me cause I don't ever take the lifesteal quints
MF
Daxx's suggestion for quints is a good one. AS is the most expensive offensive stat for adc, and it's often only invested in 2-3 slots of your inventory, 2 most common because of the efficiency of going bt + pd and zerks as rushed items.
Plus doran's blade gives most of the regen you'll need along with the regen defensive mastery. And feast's little buff is supposedly compensating the lifesteal nerfs for early game if you can last hit well (not just rito's word for it, some people have math crunched it)
Edit: fun fact, some korean adcs ran almost full as runes at one point because of the gold costs for as. Efficiency breh.
What's a better idea, what he just said OR:
3 AD quints
6 AS Red Marks
3 AD red marks?
^That's the page Piglet uses