Help with Zeus.

I am trying to become the best I can with Zeus. Is there any advice you guys have that will improve my Zeus?

Currently I start out with Ring of Basilus and Tangos. Then I buy boots and save up for Arcane Boots. Afterwards I upgrade my Ring of Basilus into Ring of Aquila and then I head for Refresher Orb and then the scepter. Finally I go for Shivas if the game is running a bit too long.

I try to stay in the rear and nuke as much as possible. Any help would be greatly appreciated. Thanks!