Mana sets the pull pace
Warrior brings threat and damage without sustain. Shaman brings healing and totems, then Windfury at 32. The pair can kill quickly when Warrior keeps the pull count within Shaman's mana.
Give each player a role
Warrior chooses the pull and holds it. Shaman heals, chooses the totem for the pull, and calls for a pause when mana is low. Windfury joins at 32.
Use Earthbind Totem when the pull needs space. Warrior can Hamstring one target while Earthbind slows the whole pull.
Shaman handles casters with Earth Shock, and Warrior keeps melee targets off the Shaman.
Watch mana and terrain
When Shaman runs out of mana, Warrior has no recovery plan. Treat the mana bar as the pace bar.
Both classes work near the mob. Caves and tight rooms leave less space than open-world pulls.
Keep the pace tied to mana
Warrior pull pace depends on Shaman mana. Drink and reset before the bar is too low for the next pull.