I don’t care for the whole Khador == Soviet Russia oversimplification, but with the release of the Kayazy Underboss unit attachment and Yuri the Axe, there’s a rather solid cold-blooded-killer army available now for the Motherland:

Faction: Khador
Army Points: 750/750
Victory Points: 26

Kommander Sorscha Kratikoff
– Destroyer
Yuri the Axe
– Manhunter
– Manhunter
Doom Reavers
Kayazy Assassins (8)
– Kayazy Assassins Underboss
Kossite Woodsmen (6)
Widowmakers
Eiryss, Mage Hunter of Ios
Gorman Di Wulfe, Rogue Alchemist
Kell Bailoch
Croe’s Cutthroats (6)

Each model is directly associated with assassination, Kommander Sorscha being renown in WARMACHINE for her “woosh” tactic, leading to the quick demise of many enemy Warcasters over the years. The Destroyer has traditionally played the role of Sorscha’s assassination-partner for the Wind Rush to Icy Gaze combination along with Eiryss. Each of the other mercenaries is explicitly a professional assassin, as are the Kayazy ally unit. The Widowmakers are snipers, not assassins, but this is a rather fine semantic point from the perspective of Khador’s enemies. The only models that are a bit of a stretch thematically are the Doom Reavers (a penal unit of berserkers driven mad by their enchanted weapons). I included them due to the criminality of their background. The Kossite Woodsmen are treated as mercenary near-criminals in the background information, and add to the “hired gun” flavor of much of this list.

It’s also almost entirely Advanced Deployment, which is big fun. Line your little gaggle of murderers up against precisely the assets you mean to. A variation is also possible for 500pt games, but doesn’t quite have the punch and lacks the thematic overkill.