Well you're going to want to train more AA's for start.
Focus on Decisive strikes, Field of War, the CC break, Invigoration, either get Red shadows of xoti, or the other one that lets you charge multiple times.
For spec
I'd go for something like this.
http://goo.gl/L1dxFj
Bindings and skills are something you're going to have to figure it out on your own.
As for rotation, its simple.
Hox HFB is easy AoE instant spell. With the silence if you time if right you can easily interrupt an entire groups combo/spell.
IF you want to get kills, I'd suggest do what we do in premades, focus the ranged classes ( Ranger/necro/demo) as they will melt your team. If there is no range class, focus bear shaman/barb/tos/pom etc, Tanks should be your last resort/ same with assassins.
Simple rotation could be this, (transform, charge in (Use tome of erik instantly while you charge in, hfb, find your target, put spit fire and chains of anguish on him, hfb again. kite jump around literately jump "AROUND" the group try to make yourself hardest to get hit by melee because you will die. Dance around hfb till your target is dead and gtfo regen health, rinse repeat.) Of course if you have phoenix cloak up use it before you charge in. However I'd save PC for more important times when groups are grouped up.
Just fyi, hox is one of those class you can't try to top kill without dying a lot. If you go in with the intention to kill and survive, you might find yourself die more often than you get kills.