Nurgle chaos spawn conversions (work in progress)

Recently I've been preparing an army list for the Corehammer 'Dark Throne' tournament that's coming up in a couple of weeks.

My army list features 2 units of spawn with the mark of Nurgle. The first of these units is represented by a set of three Plague Toads which I've been working on recently. The second unit is going to be based around the rat ogre models from the Island of Blood set.

Thus far I've managed to get a hold of two rat ogres for conversion purposes. Here is what happened when I had a go at combining them with some bits from the Talos Pain Engine and the Hellpit Abomination...