The Bear stretch means staring at a bear's butt for days. Druid is the jack of all trades, master of very little until Cat Form at 20 and Travel Form at 30.
Warlock keeps one mob busy. Druid Roots another and heals the damage. The pair clears the pull before either mana bar gets low. Druid's MP5 recovery paired with the Warlock's Life Tap, DoTs, and a pet makes the pair fast and safe.
Pull with Moonfire or Faerie Fire from range. Cat closes the easy fight with Rake, Claw, and Ferocious Bite. Bear takes over the moment HP drops below half. Heal after the pull. If you pre-heal, shift and kill. By the time the mob dies, mana should be back.
Shift early. Cat is a poor choice for a pull that has become uncertain.