You could try Prot-DPS.
Build looks something like this: http://talent.mmo-champion.com/?warr...xxUT,R8d,10952
There is also the possibility to shift points from Cruelty to Imp. Overpower & Taste for Blood, but at least with lower gear it isn't worth it, because Devastate does more damage than Overpower (even when factoring in the higher crit chance). When and if it becomes feasable, i can't tell.
As gear you wear normal plate dps gear and a slow MH + Shield. Gemming either for strength or armor pen.
Shield Slam > (Rend) > (Overpower) > Devastate
Rend might be worth it even with the spec without Overpower, but i don't have the numbers in my head.
You don't generate a lot of Rage, but you don't need a lot either. Sword & Board makes a lot of SS free of cost and Devastate and Overpower are cheap as hell.
The theoretical output isn't as high as Arms or Fury, but it is something a bit different.