Darius is an Attack Damage carry obviously, but with this build you will be able to maximize his ability to carry and to be fed. Also this is my first build so hopefully I won't mess it up too badly. On my last note if you feel as if though you don't need the armour you may change up the Guardians Shield with a Maw of Malmortius.

Some credit goes to OTGBionicArm for ability sequence and runes.