Knight Replacement for Calladius?

I’ve just picked up two boxes of the newest combat patrol for a decent price, so I’m most of the way towards a 2,000 point list once I get the inquisitor. I know there is a bit of an issue regarding anti-tank weapons currently in the list but I’m not looking to try and fight my way unto a functional Calladius unless they give us a plastic model.

I do have two Questoris knight boxes are eventually earmarked for use as despoilers, but in the mean time I want wondering if one could work as an anti-tank platform through the power of magenta.