Azmodan is fairly versatile for a ranged Hero (see my other guides for more info on different ways to punish the weak).

This guide is all about pushing lanes. Bribing, Demons and Infernal globe for farming bribes and getting hero last hits. Super Straight forward, when you push a lane back to the towers, hire the ogres with bribes, once you clear the way, Summon your demonic invasion, your Army of Hell (Warriors and Lieutenants). Rinse and repeat for a guaranteed lane pushed by the end of the game.

DO NOT FORGET ABOUT YOUR TEAM OR YOUR OBJECTIVES:
This build works best on certain maps (check it out) and against teams who do a lot of non-splash damage. Overwhelm them, Tear their flesh from their bones! Azmodan comes!