1500 points doubles vs Wfite scars and Grey Knights

I'm new to the forum though I've been a mandrake, I.e. Lurker, for three months. I plan to post images and further fluff for my Kabal in the future but to kick start my forum posts I'm going to post a list I've made for a doubles game I'll be playing on Tuesday.

I'll be allying with a Chaos player, whose army is a complete mystery to me, against white scars (bike bonanza) and Grey knights (Dread Knight supreme).

Without too much introduction here's the list:

Archon: venom blade, drugs, PGL and shadow field.
5 Incubi.

Haemonculus: Flesh gauntlet, liquifier, scissor hand, vex mask, WWP, animus vitae and shatter shard.

8 Wracks, liquifier and acothyst with flesh gauntlet in raider with FField.

9 blood brides with 2 hydras and an impaler, Syren with blast pistol and venom.

10 Kabs with S cannon in raider with FF and splinter racks.

5 hay wytches in Venom with extra S cannon.

5 scourges with haywire blasters.

Ravager with disintegrators and Nightshields.

Talos with extra cc, chains and S Cannon.

Plans was to get the WWP in to cover, keep the Ravager to blast Marines and bikes that get too close and go hunting transports with Scourges and wytches.

Hell breaks lose when the portal opens with blood brides and Incubi there to kill the knights and terminators.

Should I keep the lances in the Ravager? Is the Haemi tooled up enough to survive the front wave while reserves wait to come on?

Any advice would be appreciated.

If you plan to take the Talos against infantry i would prefer a 2nd Ravager w. canons

Unfortunately that's not an option. Hoping the scourges and Kabs can lay enough fire down to be anti infantry. Dreadknights are montrous creatures so poison should cause them problems.