I've used this stratagem to great effect, as Wracks are a unit that hits that sweet spot of being resilient enough to make enemy's attacks feel wasted, while also being deadly enough turn 3 onward so that they cannot be fully ignored. First turns they serve as a decent screening unit, then later I use the stratagem to replenish the casualties and move them closer to objectives in spots that I have cleared out with Disintegrator fire.
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Siticus Empyrean Vision - my Facebook page with various painting projects
Siticus' Empyrean Visions log - the project log for my Aeldari works and beyond