I know these few guy will not be game legal since they are from Incursion and not GW.
But I want to use these guys as proxy Ogryns.
My army would never stoop so low as to employ abhumans.
So the idea is the Mad Magos Edison has uncovered the plans for an ancient battlesuit that did not require special surgery to be able to pilot.
It does however run off of forbidden nuclear technology
But studying these plans and a few captured Tau battlesuits, he has invented the O.G.R.Y.N suit.
It is slow and ponderous but heavily armored and able to wield weapons too heavy for a Grunt alone.