Valourstrike vs Houndpack

Brothers-in-Arms, pray, lend me your sage wisdom.

Tis foreseen by the Psychers of the Imperium that soon my house shall be besieged by a traitor lance. Share with me your knowledge of the Heretics and how to lay them low?

My house has prepared two Cerastus Lancers, one Warden and one Paladin. They have two Warglaives and a Helverin in tow.

The Houndpack is 5 Karnivores, 3 Executioners, 3 Moirax (with Conversion beamers) and 2 Stalkers.

The battle looks like it will not fall in my favour. My Knights are bold but inexperienced and this Houndpack has already seared a legacy of pain and suffering among my allies.

Aid me, for the Emperor.

(Advice and tactics would be great, I know I'm screwed but I want to give him a run for his money.)