It will take practice so don't get discouraged. Swipe if you have more then one target and keep thorns on. Also, have the bear attack for a short while before DPS/heals starts (simple tip: any HoT you put on the tank before combat starts won't generate threat). Another common tactic is to have the tank switch to a second target and start generating threat while the DPS finish the first mob. Timing takes practice so the first mob doesn't take off after the DPS.