While I definitely agree with Loix that Rogue/Mage had by far the highest skill ceiling of any comp, it was definitely and without question not the best, simply because some matchups are unecessarily hard while others, someone mentioned the m.u against Paladin healers, are almost autowins.
The best comp is the one that statistically speaking, considering equal skill, wins the most matchups, and that, in TBC arena, will always be Druid/Warr or Druid/Rogue. I would give the upperhand to Druid/Warr if it wasn't for PvE equipment, especially Black Temple equipment, which pushes the Rogues damage output a lot. These two comps have basically no autolose. The closest you get to a statistical win against Druid/Warr or Druid/Rogue would probably be Shaman/Warr or Shaman/Lock, because Purge and the high armor really works in favor of the Shaman, considering LifeBloom didn't heal all that much and was very mana-intensive.
There are other great comps out there of course, some named by Loix: SP/Rogue, Disc/Rogue, Druid/Lock are all top-tier combos and have very balanced matchups. In some cases, like against double damage dealer compositions, they might even do better than the aforementioned druid combos. Especially Disc/Rogue is so incredibly versatile it is essentially impossible to counter.
I highly disagree with people thinking perfect CC chains weren't a thing in TBC and that the skill level was very low. It was lower in general, but on the highest level that makes little impact.
Even on funservers you'd find people that can vanish blinds, vanish deathcoils, chain perfectly, fakecast perfectly, pummel an instant pet summon from a Warlock (looking at you Hoodrych) and execute advanced strategies.
How many of you actually still play TBC? I'd be willing to give it a shot, TBC-era WoW is probably my favorite game ever made and will always be.
I'm playing on http://www.excalibur.ws/ it's not exactly a russian server although it feels like half of the server speaks cyka blyat
Your team is midgets gone wild, innit? Would you rec. this server for solely arena purposes? How do you like it? How's the activity, queue times?