Talk:Ezreal/@comment-4481508-20110929221414/@comment-2124153-20111011212913

Someone builds Armor/MR both, enough that you actually care to get %pen, they aren't doing squat for damage relative to the carries/mages, and aren't high priority targets. Shoot someone who is a threat, and the guy who built like a fortress can be focused down later. If you bite on the bait, you're probably just hurting your team.

Beyond that, you're getting into edge cases.