Oh, as a added note, the Hss’tafi are a group of sellswords that have lived in the mountains of Dragontail, and the Reach for a couple dozen generations. Thus their expert warriors in tough terrains like mountains, along with being better armed, skilled, equipped then your average forsworn (the latter due to nice donations by the orcs :P). So might prove invaluable in fighting forsworn rebels, just keep in mind forsworn obliviously outnumber them, so my advice would be to use them to train some of your soldiers in mountain warfare, and have them lead your troops as scouts and skirmishers. So they can point out good paths, and prefect ambush spots the enemy themselves might be using.

But they are highly specialized troops, so using them elsewhere, like in far northern marshes or Whiterun holds plains will be throwing them away. Plus being Sellswords they are not fully dependable, Redguard honor will see them through until their contract is done, but they wont follow suicidal orders. Can't spend their pay check if their dead.