User blog comment:Willbachbakal/(Champion Concept) Skjold, the Shield Warrior/@comment-5088437-20130121012340/@comment-1330314-20130124064423

and beg to differ. A great deal of tanky items don't feature Ability Power either, so I don't see your point. I would also like to point out that 's has a bonus which scales off of AD (and quite a lot of it).

And while the ability does scale off of 100% AD (total AD, otherwise it would be marked "bonus AD"), this is actually quite bad in terms of AD scaling. The Armor and MR bonus isn't as big as it may seem either. At 400 armor and MR (which I don't think is even possible) your abilities would deal only 160 extra damage each. Both are also single-target abilities. Contrast with, who already gains AD from armor but also returns 10% of it per attack for 6 seconds with. Essentially, it prevents his damage from falling to insignificant levels in the late game.