It doesn't work unless your laning against someone that is clueless. You may have alot of sustain but it only works if the enemy never just charges you and go for the kill. Any champ will just bum rush you and kill you everytime since you lack 200 HP/30APor20AD and boots. Also it means you can't push the lane as well and you lose out on the mid health pack. Lastly wtf are you going to make with 3 vamp? You only need 1, meaning you're just going to sell the **** thing for a loss. The Sanguine's passive is unique, gettng anymore than 1 not cost effective. Besides AD carry's damage comes from CRITS. Your BFsword isn't at all cost effective unless you are landing crits.