Anything that pierces or removes his armor is going to cause you problems. He only has 14 health which is decent, but not amazing. As soon as that armor isn't protecting him, he'll go down like sack of bricks. Additionally, he has flying so you should be able to dodge most attacks, but be careful of Maim Wings or Knockdown. There's not much you can do against this except Nullify.
The way I've seen most people deal with him is to remove flying and then stick him in place with a Tanglevine, a "Stuck" condition or a Force Hold.
You can Rhino Hide him to make it even less appealing to attack him. You can give him Vampirism; you can give him Cheetah Speed or Bear's Strength.
The trick is to be careful not to go all in unless you're certain you can pull it off. The more you invest in one creature the more you stand to lose if it dies.
Like Schwenkgott says, Battle Fury will get an extra attack off for him which is really good. You want to make sure you're hitting a really high priority target to get the best effect out of the Battle Fury.
