Yep, you're correct.
As for how effective all of those attacks are, well, it depends. It'll clear out lesser chaff, like goblins or skaven clan rats. Plaguebearers are tougher customers, however.
IIRC, Vanquishers are a popular battleline choice for SCE, because they're relatively cheap in squads of 5 and can put out a respectable punch.
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