Get rid of imp mortal strike and endless rage. They are both completely useless. Instead get deathwish. 20 percent increase in damage helps allot.
Endless rage has no use in PvP. You will rarely run low on rage and imp mortal strike is only like 6 percent increase in damage. Plus deathwish allows you to break multiple fears and 20 percent increase in damage. Go for imp intercept and slam. Slam is a really high damage attack and if you time it right with your 2H weapon it pwns. Improved intercept will help majorly in the arena and make it ALLOT harder for others to kite you around.