I'm sorry to say, this isn't at all competitive.
For a start its a bit all over the place. I mean you have 4 squads of Warriors, and some people will probably say different, but in my experience they don't kill anything (unless you have 3 Monoliths maybe). you then have Immortals, Pariahs, Wraits, Destroyers, Tomb Spyder, Heavy Destroyers and a Monolith. I really don't think you can be competitive at all with a mixed and matched list like this.
You either want 15 Destroyers, or 3 Monoliths (You could actually fit both in 2000 points

) as a starting point. Monolith army, you can then have Warriors, Wraiths, maybe Immortals, if you like them then Pariahs. Destroyer army, you would want max Destroyers and maybe 3/4 Heavy Destroyers.