what are the best addons for pvping.
links would be much appreciated :)

Proximo: Tracks enemies throughout arena, updates their hp etc. Allows the player to click on their name and perform multiple things (macros, target, etc). Only downside is that, you have to mouseover said targets before combat (aka stealthed targets hp will appear, but no clicking actions)

http://wow.curse.com/downloads/details/8291/

Quartz: for those that still use /stopcasting in their macros, also has a miniswing timer as well as focus targetting etc

http://wow.curse.com/downloads/details/7960/

Nature Enemy Cast Bar: personally I have never used this, but I hear it works wonders.
http://wow.curse.com/downloads/details/2786/

why u think proximo isnt working anymore? It works just like before, even some new stuff in the new version of proximo. The only thing u cant is the talent tree and its becuz blizzard removed it.

Proximo is a must esspcially with the macro thats lets you see everyone right when the match begins.

http://arenajunkies.com/macros/general/#tar7

Also Natur EnemyCastbar is a great mod that recommend to what they have casted or what CD is coming back up on their UI.

http://wow.curse.com/downloads/details/2786/

Sounds great :) thx

Afflicted is also very nice ;)

http://www.wowinterface.com/downloads/info8063-r620.html

http://wow.curse.com/downloads/details/1595/
partytarget it's really good it allows you to see who target who and what they are casting.
I don't know if it's work with 2.4.

I am rolling a warlock if there is some special addons.