I will preface this build with that I don't think this is the best build out there and will definitely not be for everyone. If you like to sit back and spam force shock for crystal frag and Caluurion procs this build may not be for you. But if you are looking for something different in the post murkmire BG scene read on.
The gear setup is:
5 × Overwhelming Surge(Jewelry and 2 small armor pieces)
5 × Torug's Pact (weapons, 1 light piece, legs and chest heavy)
2 × Iceheart (light)
Traits are all impenetrable
Front bar is 2 × Infused Torug's Swords with Charged Weapon & Oblivion enchants.
Back bar is infused Torug's Ice staff with Hardening Enchantment.
Skill bar setup:
Front = Streak, Boundless Storm, Haunting Curse, Mages' Wrath, Crystal Fragments with Energy Overload Ult
Back = Dark Conversion, Power Surge, Blockade of Frost, Proximity Detonation, Daedric Minefield with Eye of Frost Ult
Play Style:
This is where it will get different for most magsorcs. The goal of this build is to cause absolute mayhem while trying to line up Proxy Det, Curse, Frags, Mines and Enchant procs to get Kills. While utilizing Blockade to do your shield stacking for you by proccing your hardening enchant.
The trick to this build is being aggressive and unpredictable as to cause as much chaos and mayhem as possible by almost always taking the initiative. You will want to cast streak essentially everytime the cost debuff wears off. You will cast Proxy Det and curse then streak right into/through the enemy team/group. Drop mines and Blockade among them and streak again if the debuff is gone or re-up proxy if it has gone off. Then look for potential kill opportunities by beating on them with your sword enchants, curses, and frag procs. Casting streak, boundless, and mages wrath to proc frags and your Overwhelming surge set. For particularly stubborn targets or when a healer is present pop overload. The attacks proc your enchants as well for some serious pressure and burst since you can weave with curses, frags, streaks, etc. Plus as some will notice I don't have a sustain set and the magicka restore is handy.
Bar setup isn't hard and fast either. Basically whatever makes you comfortable but best accomodates crystal frag procs and obviously blockade of frost has to be on the ice staff bar and overload on the DW bar. You may wish to consider Elemental Weapon from the psijic line on the DW bar as this was my initial inspiration for the build but found heavy attacks procces both enchants at once for more burst plus stamina I could exchange for health and magicka via Dark Conversion.
Now I've only tried this in BGs as I despise cyro but it could potentially work in the right small group setting there but I haven't tested it. BG results average 10-15 kills 500k-700k damage but the ceiling can go much higher like when my form is on and your team takes advantage of your mayhem like I did here.
http://imgur.com/gallery/Y5jvvN1