This guide was made more for myself, to categorize the items Doom should be getting in the 3 role. Doom is one of the most flexible heroes, and can either focus on (#1) Tanking, (#2) Damage, or (#3) Disables. I find the Ogre, Wolf, and Troll skills to be the best for Doom come late game, so I loosely suggest which items go with each creep.

Keep in mind, sometimes a tanky doom will want extra damage aura from the Wolves, and sometimes Ice Armor will help keep your Peruvian Sniper alive when opting DPS.