The Enigma Order

If you aren't 61 yet, you won't have a proper dps rotation going, because you don't have obliterate, a solo pve rotation should go something like icy touch -> plague strike -> blood strike -> blood strike -> obliterate and then you either repeat or use death coil or continue with some more obliterates and blood strikes if you have the talent that gives you 6 sec more duration on your diseases as well as the talent that makes obliterate not remove diseases. Group PvE dps is pretty much the same rotation as above, tanking though is quite different as you use mainly blood boil, pestilence and maybe death and decay to tank with.