Welcome to Librarium Online!
Well, just a little field experiment here, this list is designed to play against lists, and run circles around them. So, it will consist of units like Warp Spiders and Swooping Hawks (i want to try them before saying no), and Support Batteries, Reapers, and Pathfinders for bait.
So, as a rough plan:
Autarch with Fusion Gun, Mandiblasters, Jump Generator, Power Weapon.
20 Warp Spiders, standard kitout
10 Swooping Hawks, standard kitout
3 Vibro Cannons
5 Dark Reapers, standard kitout
I dont have my book at the moment, but I imagine it should be about 1500.