Talk:Riven/@comment-25553136-20141025122709/@comment-4834593-20141031185820

And what if I instead buy 10 AD?

50 to 60 means 33.33 to 40 = 6.67 dmg increase at 50 armor.

50 to 60 means 25 to 30 = 5 dmg increase at 100 armor.

At these numbers, I do have to admit, it indeed looks like, compared to another armor amount, armor penetration has more benefit than AD. However, that may be different at different armor amounts, and of course you should not forget gold efficiency. I'm too lazy to calculate all of it exactly, but there's one thing I do want to remind you of: A Brutalizer doesn't simply give you armor penetration. After taking the gold you need to buy 25 AD, you only spend 437 gold on 10 armor penetration and 10% cdr, where I want to mention that armor penetration increases the base damage from abilities, whereas AD does not. Even at level 9 that means armor penetration basically increases your damage twice as much as it seems to.

Just compare to Tiamat with the gold you need: Tiamat has 1440 gold in the AD, leaving 460 gold which you basically pay for the passive and active (or are you telling me you actually notice the health regen?).

Do you want 15 AD and the Tiamat passive and active, or do you want 10 armor penetration, 10% cdr and 563 gold to spend on something else, like... 10 AD and still having 203 gold left?