Mage Leveling Build (Level 40ish)Follow

My mage is hovering right around level 40 right now, and since I'm fairly new to the game and this is my first toon, I've been playing with one of the pre-packaged roles. I can't recall what it's actually called, but it looks something like this (from pure memory).

Here's the problem: my pet is officially worthless. Not only can he no longer hold agro on a single mob, but if I want to engage multiple mobs, he dies too quickly while I deal with the other one, and I end up tanking. I've taken to using him more as a distraction than as an actual source of damage/tanking. This means that I have had to change up my standard spell rotation and begin combat with an Icicle just to slow the mobs, then move in to the standard building electrified debuffs, Ice Shear, insta-crit Icicle.

While this has generally solved the problem I had due to lack of a pet tank, I still feel like this build has a bunch of wasted points in it, especially in the Pyromancer tree. I haven't figured out yet how to incorporate the Improved Fire Blast into my spell rotation, and I don't really use any of that tree's abilities past Burning Intellect. What I'd really like is a build that focuses more on either the Stormcaller or Pyromancer tree individually (although being able to slow enemies with frost spells is sure handy). Plus, the Elementalist tree is completely wasted without the pet; I'd like to replace that with something else with more utility.

TL:DR: I need a non-pet mage leveling build around level 40, and I'm too dumb to make one on my own.

Edited, Apr 5th 2012 9:17am by Demea

What's the spell rotation for a build like that? From a quick glance, I'd guess something along the lines of Radiant Spores > Wither > Dark Touch > Leech Life > spam Void Bolt.

For the record, I caved on the "no pet" requirement and went with this necro/lock build. It's so much easier than soloing as Stormcaller/Pyro, I almost feel like I'm cheating somehow.

Thanks again for the help!