Just you wait until your dogs start dying in seconds. Should take about 3 or 4 levels now. >_>
Honestly, the reason why the WD sucks so much is the lack of mana/mana regen. Dire Bats cost about 115 mana/sec, so you've got about 4 or 5 shots before running out. From then on, it's basically running away for 15 seconds waiting for your mana to regenerate. Same deal with Bears or Acid Cloud. Basically, you spam spells and hope to kill stuff before your mana runs out - if you don't, you'll be a sitting duck for a while. Only way around that is Vision Quest, and that throws strategy out the window.
Wizard, on the other hand, is just crazy good. Blizzard with Snowbound costs only about 20 Arcane Power to use, which means 7 good uses before running out, and even then, it takes about 6-7 seconds to replenish AP completely. In the time it takes me to cast a spell, I have already regenerated half of it.
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When you have nothing to say, quote yourself ~ Solfadore