While i definitely agree with the suggested artifact lands, that would eliminate your ability to legally play in Modern format. I currently have a similar deck build that uses those same artifact lands that i use for at home game nights with friends. A quick suggestion for a more competitive edge to your Modern build, i would definitely swap some lands out for
Watery Grave,
Polluted Delta, and maybe some Sunken Hollows. This will ensure a more reliable mana base for your spells.