1500 pts- 9 or 18 reavers

Archon- 105
Blaster, Shadow Field

Trueborn- 183
4x, 4x Blasters, Venom 2x SC, NS

Trueborn- 131
3x, 2x Splinter Cannon, Venom 2x SC, NS

Warriors- 120 (4x - 480)
5x Venom, 2x SC, NS

Reavers- 253
9x, 3x Blaster, Arena Champion

Ravager- 115 (3x - 345)
3x Dark Lance, NS

or


Archon- 105
Blaster, Shadow Field

Trueborn- 183
4x, 4x Blasters, Venom 2x SC, NS

Warriors- 120 (3x - 360)
5x Venom, 2x SC, NS

Reavers- 253 (2x - 506)
9x, 3x Blaster, Arena Champion

Ravager- 115 (3x - 345)
3x Dark Lance, NS

The reason for the NS on every single vehicle, including blasterborn- Fire Warriors can't shoot them, so can't Devs with Heavy Bolters

I'd say go for 18 reavers. It adds more speed to your force, while also being a lot more fun (in my opinion).

It hurts your scoring units count a bit, and it removes a pair of venoms, but it is worth the trade off if you use reavers carefully