Riven Question.
So, I just picked up Riven for fun, and she is fun, but I'm always wondering why I don't see many people pick up health defensive items. Other than the fact that she does incredible damage, and that her shield scales with AD, I see no reason not to buy items that give her armor or magic resist. Because if you pick up Hydra, Black Cleaver, and Bloodthirster, which is 205 AD, plus her normal max AD, and then whatever runes you have, you'd have about a 210 + 205 + 107 + x strength shield. With X being whatever runes, of course. Math!
only has mr and the active and it costs 1250, it builds into
that has the AD.