In this game there are a lot of mobs that can be burned down quickly, standard type, just scream around them, stun them then get the. It ones attention (elite or champion). Use guard on healer or troublesome DPS that keeps pulling. Overall know the mechanics of the fight, your job is to help control mobs, keep them in a certain area, not killing healers DPS. One final note, it's ok to let a DPS die, don't always let them die, but if they get stupid let them die and pick them up after. Once you res them, politely remind them what they did wrong then carry on. If it comes down to it always save your healer, they keep you alive. Remember it's a group work together and talk to each other, especially your healer. Have them let you know I your taking too much damage, that lets you know to use CD more. Last piece of advice, if you die with a CD available you aren't doing your job. Remember CD are to save your hide, use them. Have fun!