Learn to mark a target. In AK people tend to throw aoe/dot at the other enemies just to do extra dmg while focusing on your main target. Grab hate then rotate between the enemies to make sure that their threat tables are low. Also if you have a blm (or maybe a whm) they could sleep the others while they attack the marked target. AK is kind-of a tank check because you get alot of adds and your dps loves to do their own thing. I think plds have a little harder time keeping hate in ak due to the fact that flash is their only aoe grabber. So in conclusion:

1. Mark your target. If you're on PS3 set one on your hotbar. You only need one, just mark a target and before it dies switch to another and mark that. It will make a difference.

The rest is up to how well you can maintain the threat tables among the mobs. Good Luck and welcome to AK