I love where boomkin is myself. Beside every 3min its hard to do big dmg on call, but at any time you can hit a lucky proc and take half of someones hp. And a good proc with cds up will damn near one shot people in arena. 240k is my top crit, that was in 5s at 1900mmr so it wasnt some random guy in !@#$ gear at 1300mmr. Ive hit some crazy numbers in rbgs/bgs with FC stacks or orbs.
1v1. Its not as bad as most make it out to be. There are 3 classes i will not duel, Rogue, WW monk, UH dk. Beside them 3 i can give just about anyone a run for their money. It may not be a given duel, but played right you can get the win.
2v2. Ive only done around 6 matches this season with a healer. It makes for really long games but a boomkin with a good healer is very hard to kill. Double dps is where boomkins shine in 2s, im running with a rogue we are 303-127 1945cr 18th in the BG. Being able to change your talents in the arena is big, I use NV vs healer comps, HotW vs 2 dps. With HotW up our healing is crazy that plus your cc's and your partners cc you can live most burst. I would try Rogue, Mage, Lock, Spreist. Other dps will work but these are what i have had the best luck with.
3v3. The teams choices start to slim down but with our off healing allot of teams can work. Ive hit 2k with a few teams this season Dpreist, Warrior, me.. Rsham, lock, me,, and Hpaly, Rogue, me atm. Hit 1800 running triple dps sure we could of got higher if we did it for more then a day.
5v5. I love doing 5s on my boomkin! Dotting everyone then blasting someone down in a solar beam is awesome.. Cant tell you how many times i have killed someone with a double proc leaving the team asking what happen. But again our off healing is what helps the team the most, spread dots, shoot procs, peel and heal as needed.
RBGS. A boomkin is pretty much a must. With solar beam, vortex, DK mass grip, Mage RoF worked right its a team killer! But we have decent raid pressure, and we are great for Offense team for FC maps. You should have no problem find a rbg as boomkin.
I have only played WotlK, The last few months of cata, and been playing all of MoP but i feel this is the best spot boomkin has been since i have played. Im actually surprised on how much hate boomkin gets on the forums. I may not be pushing glad or even duelist, but im not doing bad by any means.