Plain-ar Chaos

Hi. I was wondering how, for a 10 proxy metagame, I could make some variant of this deck competitive without sliding over towards multicolor too much. Thanks for your help!

Plain-ar Chaos, V. 1.0

4 Glowrider
4 Kataki
4 Aven Mindcensor
3 Jotun Grunt
3 Stonecloaker
3 Devout Witness
4 Oblivion Ring
4 Chalice of the Void
4 Null Rod
2 Mirror Entity
4 Ancient Tomb
4 City of Traitors
1 Mana Crypt
1 Mox Pearl
1 Black Lotus
14 Plains

This deck's gameplan is to attack the opponent's. Every creature has some kind of disruptive effect, and the 12 noncreature permanents (Chalice, Null Rod, O-ring) make modern manabases even more nightmarish. The deck does well versus post-brainstorm Blue, Kataki/Rod depenently vs. Shop, and decently, thanks to Grunt and Cloaker, vs. Dredge, but is weak vs. Storm, and really suffers versus Oath. I'm also concerned about the lack of CA. Thanks again for your help.