Just figured I would share my idea for a ranged sorc spec based completely around dots. I don't have all the skills to make it for myself yet, but thought it would be good to throw it out there.
Sorc Dot Build
Main abilities:
Poison Injection (Bow)
Degeneration (Mage's Guild)
Consuming Trap (Soul Magic)
Searing Rune (Mage's Guild)
Inner Light (Mage's Guild)
Ult: Soul Assault (Soul Magic)
Key secondary abilities:
Quick Siphon (Resto Staff)
Streak (Stormcalling)
I'm hoping it would be a fun build in PvP since there are only 2 cleanses in the game that I know of, and only 1 of them can get rid of all 4 dots and is class based. Might want to travel with a friend that has some burst damage to support you though. Try it and let me know how you like it! Can't wait to build it myself.