Talk:Kha'Zix/@comment-7619298-20130617074033/@comment-7619298-20130619115142

You are paying 870 gold for 40 ap. 330 gold for the 12% Spell Vamp.

With that amount of gold you can buy a Vampiric Scepter (800g) and one longsword (400g). That means 40 ap vs 20 ad.

Let's say you poke someone with E, AA, Q, W and back off afterwards (level 5).

With 20 ad you will do an additional 86 physical damage. You heal for roughly 10 health with the aa.

With 40 ap you will do an additional 20 magical damage. You will heal for ~40 health. If you last hit an isolated creep with Q, you will also heal for ~22.

As you can see, the sustain from Hextech Revolver is strictly superior to 10% Life Steal.