Zerker greaves should be good most of the time, unless you expect to be getting a lot of CC on you. You shouldn't be getting near the fight anyway, and you should be taking escape summoner spells like Ghost or Flash or Cleanse.
You should probably also start with a Doran's Blade, as it will give you more survivability than a Scepter and still give you a decent amount of life steal.
After Bloodrazors, consider maybe a Banshee's Veil for survivability. Bloodthirsters are good. Zeal's might be good too as movement speed would help a bit for escaping.
I personally like CDR a lot, but I would think blue and yellow Atk Spd runes would be overkill. CDR would allow him to use his W more, and if he has mana problems, I would consider mana regen blues instead.