Vi W abiltie passive + 24 lethality rune page just makes this amazing dmg and tank potential. these items makes vi so tanky even if the enemy has much dmg. vi got a magic shield and a passive what gives her a health shield. trinity makes her Q and E powerful and it makes her E get stronger because of the Armor pen you got off her W passive. Vi dont need Lifesteal because she got so much tank potential she can even kill someone without dying completly. she has much tankyness and health and health regen. Ninja tabi is very good against ADC because it blocks so much damage but if you want to be stronger against ADC go for a randuim Omen instead of dead mans plate. She has a big power spike with just trinity and blood razor.