Turn 4 assaults and Haywire grenades Vs. armor

My last game involved 2 turns of breaking LoS almost completely and then flat out moving 3 raiders (10 wytches w/ hekatrix w/ haywire grenades, and 20 stock raiders) in to support my 5 man squad of DSing HWB scourges and a Blasterborn venom( both of which caused 1 hp each to a single russ). At the start of turn 4 I had my  wytches and 20 kabalites within assault range of a 2 russ squadron and of a 3 russ Cmd squadron. In the assault phase of my 4th turn, 4 of the 5 russes had been destroyed. The Haywire grenades on the hekatrix did 2 hp's worth of damage and the 27 s4 attacks did 4 hp, killing both tanks in the squadron. Turn 5 had the wytches charging KC pask and his two other squadron mates. Again the HWG's caused 2 hp's and the 27 attacks caused 4 hp's, killing pask and another tank. In the same turn each of the 10 man kabalites charged a different chimera and destroyed them. This was by far the most successful game I have ever played against IG armored.

HQ

Archon with Blaster and webway portal 115pts

Kabalite warriors X 10 80pts Raider with Dark lance 60pts

Kabalite warriors X 10 80pts Raider with Dark lance 60pts

Kabalite warriors X 5 40pts Venom 55pts

Wytches X 10 W/ Hekatrix W/ Haywire grenades 115pts
Raider with advanced Aethersails and Nightshields 60pts

Kabalite Trueborn X 9 with 4 blasters 169pts Raider with Night shields 70pts

Trueborn X 5 with 4 Blasters 115pts in Venom 55pts

Scourges X 5 with 4 Haywire blasters 120pts


Points: 1188
Shooting for 1250

This is my current list, in which I removed the splinter racks and additional splinter cannons off of the two venoms to allow for either blasters, or Sybarites/Dracons with HWG's on the kabalite/trueborn squads. The reason for reducing the poison is that I rarely go up against massed infantry, and squadrons of russes and chimeras are my main concern.  Points wise I can take 4 blasters, Syb/Drac with HWGs, or a combination of both.

I'm leaning towards adding the HWG's to the two, 10 man kabalite squads as well as to the 9 Trueborn (changing one to the Drac, not adding), and adding a blaster to the 5 kabalite venom for versitility.

Leman Russ has 11 AV on rear, so S4 is no good against it...

Some of them, not all.

Demolishers, punishers and executioners have AV11, the rest has rear AV10.