Vayne should not have a 4.25 ad ratio on a 2s cd.

How is this a 4.25 AD ratio? Directly from the section of the website on Vayne, "Rolls a short distance. The next basic attack within 7 seconds deals 30/35/40/45/50% Attack Damage bonus physical damage, equal to 30/40/50/60/70% of total Attack Damage." from http://gameinfo.na.leagueoflegends.com/en/game-info/champions/vayne/

4.25 AD ratio means that it makes his next basic attack deal 4.25x her AD damage. 30/40/50/60/70% of her total AD being added into the autoattack is not 4.25x damage.

dude

just lock her down she wont be hitting no one