If you are new to Arena or you are a green hand, you need to go back to the basics that could be useful. As a beginner, you can refer to the highly rated Arena players and asked them if they had any Arena experience, tips, or strategies they'd be willing to share with their fellow players. We received a lot of excellent submissions, sorted through them all, and picked out a few guides that we felt would be helpful to players new to the Arena or interested in giving it a try.
The arena has deathmatch-style PvP matches against even numbers of teams. There are two modes, team battle which are ranked and award special arena points that can be used to purchase various rewards and practice battles which award nothing but allow you to enjoy risk free PvP.
There is no objective in arena matches outside of eliminating the other team. The simple yet majestic beauty of combat wins the day in the arena. There is nothing more here then sword versus. sword, magic versus magic, and any combination of tactical offense and defense to create a swirling vortex of insanity and bloodlust.
The arena works like this. You find a goblin Arena Battlemaster who will give you two choices. Skirmish mode and Rated Match mode. The differences in the two are detailed further down. You'll come to a holding area once a match becomes available and you zone in. All buffs are removed (debuffs are left on), pets are dismissed, and you are given a 60 second buff that removes casting cost of all abilities (things like Mana and Soul Shards). During this time you can prepare for battle.
In order to be successful in arenas you need to have an extensive knowledge base. It is important for you to have talents and abilities of other classes memorized, as well as each class spec's strengths and weaknesses. Likewise you should get tot know the vital information about a class/spec include cool-downs available, cool-down duration, and knowing certain class "tells" when they are about to do damage like a Warrior goes into Berserker Stance, you can almost always expect him to Intercept, this would be a good time to play defensive and possibly try to get out of his Line-of-Sight). But for great players, they are able to track both opponent cool-downs as well as use of their PVP trinket.
The key to success in arena is communication. Voice chat is not absolutely necessary, but is definitely preferred. Call out heals that are going out. Crowd Control is going out and coming in, damage taken, kill opportunities and so on. We can't stress enough how important it is that you and your teammates communicate with each other. It is hard, especially in 5v5, for a player to know what every other player is doing; this is why communication is vital. You must be able to quickly share information so that you can make sure the right decision is made. If your enemy is focusing on one person on your team and they quickly switch to another, this information is vital to the healers. If you are splitting damage and one of the targets gets low in health, this must be shared with your teammates so they can focus fire on that target and Crowd Control the other team's healers.
In the arena, knowing your surroundings, knowing where to line-of-sight your enemies and knowing where they can line-of-sight you are also important. Raid symbols can often be a huge help to track movement.
You must find a perfect balance between doing damage, keeping aware of your surroundings and not getting tunnel vision. If you focus on just one person to kill, CC, or heal, you often lose focus of everything else going on around you. Try to be aware of everything going on. Focus Frames and Unit Frames coupled with healing/damage macros and focus macros will greatly aid you in this department.