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Suggested natural armor? Although the original had a wretched AC of 8, I think the "heavy steel plating" should at least be as good as the render's (+13).
Skills: 5 at 39 ranks
Listen, Search, Spot...
Feats: 13 (6 can be epic)
Awesome Blow, Combat Expertise, Combat Reflexes, Hold the Line, Improved Bull Rush, Improved Trip, Knockdown, Power Attack, Snatch, Stand Still...
I don't think it needs Awesome Blow and Imp. Bull's Rush. In fact, with its speed of 10, Imp Bull's Rush is pretty darn useless. Lightning Reflexes and Iron Will might be a good idea to bolster its less-than-impressive saving throws.