If Righteousness is also based on PVP then should the simplest solution be that of what World of Warcraft did with their pvp and give players abilities that can debuff healing? This can have effect of separating healing nerf from pvp and pve.
If running Windows 7, type in "taskmgr" in star menu, right click the "taskmgr.exe" and run in administrator mode and follow the instructions from first post.