As a Mage theres just 1 thing on our minds, DPS the F**K out of the boss and be #1 on the charts. Although many things can happen that can reduce our DPS drastically: Low Mana, Boss Aggro, not using trinkets fast enough, Trying to find that ONE GODDAM BUTTON (I'm talking to you
[Flamestrike]...). Heres some of the Addons I use so I don't miss a beat in DPS:
-Deadly Boss Mods (DBM)- A must have for every raider. DBM will tell you specifically when events happen during a boss fights (Ex:
Blood Beasts,
Below Zero, etc.)
-Decursive- Makes decuring a snap. Just click on the player's designated raidframe when it goes blue to decurse. Save time by not having to find that 1 person and that 1 decurse button.
-Dominoes- Basic actionbars but on Dominoes you can change the column and rows. I have 4 rows but on each side theres a box 4x3. This gives me easy access to important spells but aren't to far away.
-Mik Scrolling Battletext- Cool scrolling text for battles only these go in arches but have the important stuff in the middle.
-Omen Threat Meter- - Watch your threat on the target because that one spell could be your last.
-OmniCC- Tell you the cooldown on spells/abilities on the actual icon. Helpful when glancing at a trinket to see how much time the CD still has.
-OPie- Very useful in AOE. Simply bring up an array of custom spells you choose in a circle pattern either around your mouse or in the center of your screen. All i have to do is map it and use it. Ex: I mapped OPie to my middle mouse button. I simply move my mouse over where I want to AOE, Middle mouse, click the spell and click on the floor. Simple and fast.
-Quartz- - A cool, customizable castbar. Make it the size you prefer, add custom text and background, its fully up to you. Quartz also has a latency area so you know exactly when to press the button for your next spell without missing a second. A series of .2 second gaps can easily add up in long boss fights.
OTHER ADDONS I USE:-_NPCScan- Automatically scans and targets rare NPCs in your range.
-ArkInventory- Organizes your bag/bank by rarity, category, consumable, etc.
-Atlas & Atlasloot Enchanted- Shows a map of instances, location of bosses and loot dropped by specific bosses.
-Auctioneer- Helps you get the best deal for all your auctions as well as sell all your auctions cheaper than the competition.
-BasicBuffHide- Hides buffs on the top right.
-Dominoes_BuffTimes- Shows how much time you have left on your buffs on top of your spell/ability icons.
-Gatherer- Shows locations where other people found specific gathering nodes.
-Grid- Simple raidframes in an organized yet compact frame.
-Recount- Shows your DPS, Damage Done, Healing Done, ect.
-SexyMap- Allows your minimap to be clamped anywhere and add cool effects around your map.
-ShadowedUnitframes- Basic unitframes that can be customized to see only the remaining health of a boss, portraits, ect.
-TipTac- New description bar that gives more info and be moved anywhere to your screen.
-WoW Instant Messenger (WIM)- Basically like AIM for WoW. Keep all your whispers in organized boxes. Great if you're selling stuff and you get 20 whispers at one time. Never lose a whisper again!
If you have any questions or need help configuring, PST me ingame. 
