Building Up To 1750pts

I currently have around 1200pts with plans to add anothee 550ish when I finally make a decision on what I want.

One list I was looking at is

CA Detachment

Archon - Agoniser, Shadowfield, Soultrap, Animus Vitae, Haywire Grenades
Venom - Splinter Cannon

5 Warriors - Blaster
Raider - Night Shields

5 Warriors - Blaster
Venom - Splinter Cannon

5 Warriors - Blaster
Venom - Splinter Cannon

5 Warriors - Blaster
Venom - Splinter Cannon

Razorwing - Splinter Cannon, Dark Lances

Razorwing - Splinter Cannon, Dark Lances

Ravager - Dark Lances


CA Detachment

Succubus - Archite Glaive, Armour of Misery, Haywire Grenades

5 Wyches - Hekatrix, Agoniser, Haywire Grenades
Raider - Night Shields

5 Wyches - Hekatrix, Agoniser, Haywire Grenades
Raider - Night Shields

3 Reavers - Heat Lance, Cluster Caltrops

3 Reavers - Heat Lance, Cluster Caltrops

What I actually own is:
Archon
Haemonculus
Succubus
20 Warriors
10 Wyches
6 Reavers
3 Raiders
Venom
Razorwing

I'd like to obviously use most if not all of those for maximum cost effectiveness but if anybody has any suggestions for directions to take the list and what new toys to buy I'd be grateful for some inspiration!