Against Chaos Mechanized with triple Drakes

Not friendly list from my opponent but here it goes:

Warpsmith
Aegis + Quad

3x Drake
4x 20 cultists with heavy stubbers
3x Predators with HB's and Autocannons
Hellbrute

I have 1600 points to spend, and because Predator is AV 12 behind aegis for 4++ cover, followed by AV 12 5++ Drakes, Im having hard time trying to find any possible counter.

I thought Duke Sliscuss list might have best chance to go around aegis.

Duke Sliscuss
Aegis with comms relay

9 warriors in Raider with splinter racks [Duke's raid]
5 warriors + blaster in Raider
5 warriors + blaster in Raider
5 wyches + haywire granades in Raider

3x blasterborn in venom + sc
3x blasterborn in venom + sc
3x truborn + 2 dark lances in venom + sc

Ravager w/ nightshield
Voidraven w/ ff
Voidraven w/ ff


I plan to go second, wait for dragons, than with comms relay drop Sliscus and Blasterborns to wipe out Preds and Warpsmith, kill Drakes with Ravens or die trying, than just pot shot with everything and try to survive.