Mk IV, Furioso, Venerable, or the new Iron Clad varients?

The Mk IV's are more versitile, the Furioso patterns were replaced with Iron Clads which have better armor now, but the Venerable's have better WS/BS then all three.

I am Wrath, I am Steel, I am the Mercy of Angels.
mors est merces mea – death is my reward
morte in vitam non habet tenaci - Death has no grip on Life.
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