Evap would be good, though that's more for rock crawling. Relocate it and you won't need the skid.
Other than that, all armor is going to help. I bought the Evo 3 piece skid that protect the oil pan, transmission, and exhaust. It's a setup they have for the '12, but they make the skids for all years and their prices are great.
However, I do mainly rock crawling. For brush, you should go with aluminium to save weight. Up to you though, the aluminium skids are much more expensive. Steel is stronger, but heavier.