Necro: what am I doing wrong?

[Estu]

At level five, you don't want to bother with fear since it costs a lot of mana and your pet is still a good tank. Get a max level pet out, send it at the mob, have the pet tank until it's close to dying. Poison bolt the mob when you can without drawing aggro. When your pet is nearly dead, take over and tank, lifetapping as necessary; by that time, the mob should be nearly dead. When the fight's over, let the pet regen to full. Should be fast and easy on the mana.