3 comps
ALSD (Lock / Shaman / Druid)
A control-attrition comp that got stronger as TBC went on. Elemental Shaman utility + double Fear + Cyclone create relentless control while DoTs grind the enemy out. Wins the long game against almost anyone.
AShadowplay / Drain (Shadow Priest / Lock / Shaman)
Shadowplay is the definitive TBC attrition comp: a Shadow Priest and Affliction Warlock blanket all three enemies in DoTs while Mana Burn bleeds the healer white, and a Resto Shaman makes the trio nearly unkillable. You don't burst anyone down — you fear, drain, and rot until the enemy healer is out of mana and the whole team collapses at once.
BDouble-Healer Warrior (Warrior / Shaman / Paladin)
The purest attrition comp in the bracket: one Arms Warrior grinding a target while a Restoration Shaman and Holy Paladin refuse to let anyone die. You don't out-burst opponents — you out-last them, riding Mortal Strike pressure and two full mana bars until the enemy healer runs dry or panics. Tier B because a single peeled Warrior is a comp with no offense at all.