User blog comment:Freedfg/Is vayne TOO versatile?/@comment-4593717-20130720042757/@comment-6906412-20130720053231

BotRK only slows one person, gives relatively low base AD, gives no critical strike chance, and is completely countered by Armor in every case. It doesn't help any individual ADC peel versus two or more diving champions, and if you're complaining about too much lifesteal then use Ignite/Exhaust.