For PVP I like [b:ea58b4079f]Natur EnemyCastBar [/b:ea58b4079f] it allows me to see what my focus target is casting and the cooldown on their abilities and the diminishing return of my own ability I also like [b:ea58b4079f]Arena Live frames [/b:ea58b4079f]which gives me a quick way to change targets in the Arena's and it also shows all your opponets health and who is targeting who.