Mana sorc was my first character this ladder, and has gotten me Natasha's from UL farming. (almost, just got lazy and missing a few primals)
I only used immersion for single target damage but I only one pointed it, so it was useless later on, otherwise I use Arcane torrent for mobs just after I use mana sweep, and I use Antimass to empty my mana pool to use Mana Sweep. Anti-mass>Mana Sweep>Arcane Torrent>Anti-mass. You are pretty much always trying to have a full mana pool, or an empty one. Never in-between. She does not do well vs Single target if you're only using arcane. It may be a idea to go Ice/Thunder for defense and T stone for single target damage.
You can do well with honorific gear with +50 to energy, Minion res to make the ice elemental's survive better... ALSO Huge tip, The melee tree's blades are a GREAT minion to dump points into. They can survive almost anything and are the most tanky minion in the entire game I believe.
Witchmoon
Witchmoon
Amulet
Required Level: 100
Item Level: 100
1% Chance to cast level 17 Mana Sweep on Death Blow
+(1 to 3) to All Skills
+(10 to 20) Spell Focus
+(10 to 20)% to Spell Damage
Maximum Mana +(30 to 40)%
is also an ammy you should strive for. As much mana and energy as possible!
When it comes down to it though, just experiment. You'll find a mixture that will fit you best.
