Basic Arcane PVP
This is a heavy damage dealing build but has very little in survivability. It relies on POM and Pyroblast for an opening move and either arcane missiles or arcane blast for sustained DPS, or Scorch when you are being attacked. This will make you something of a glass cannon so you should not attempt it without teammates to back you up.

Arcane Fire 2
This is the famous “three minute mage”. You will be relying on heavy hitting arcane spells for most of your damage and will open with POM/Pyroblast. Most of your talents will therefore be in the arcane tree with just enough in the fire tree to get pyroblast. This is a dangerous build to use though because once you have use POM, you are pretty useless.

Arcane Ice
This build can deal massive amounts of damage, while still retaining a high level of survivability. Your main source of damage will be almost nothing but ice attacks. This build is more focuses on one on one fights and is best suited for battlegrounds, but is also a good arena build.

Deep Fire
It is very hard to PVP as a fire spec, but this gives you most of the tools necessary. Your main source of damage will be fire attacks, and you only put points into the arcane tree to get Improved Counterspell and a few other good arcane talents.

Fast Fire
This is a variation of the build above, but it focuses on the fast cast fire spells like Fire Blast and Scorch instead of Fireball. This is a slightly better PVP build in my opinion since fireball has such a long casting time that it is only effective if you are sniping other players.

Fast Fire and Frost Elementist Build
This build is designed for those who like to fight on the run. You will be using either instant cast spells, or quick casting spells like scorch.

Heavy Ice
This is your basic Ice PVP build. Of all the PVP builds it is one of the best when it comes to survivability while still keeping good DPS. You will be using all sort of ice attacks against your foe and be relying on your kiting skills to keep yourself alive.

Frost Elementist Build
This is a PVP elementist build that focuses on Fire. With this build you will open with a Pyroblast and then throw in a Fire Blast whenever the cooldown is up. The rest of your damage will come from frost spells, specifically Frost Bolt