As a tank Garuda is slightly harder - there are actually mechanics for you to watch.
  1. Avoid Slipstream - it has a cast bar but no telegraph image. It's a frontal cone. Run around or through her to avoid.
  2. Keep Garuda at the North end away from all the rocks and facing North.
  3. When the plumes appear, Overpower a couple of times to help damage them (Warrior specific).
  4. The first time she teleports, get on the south side of a rock.
  5. The second time she teleports, get on the north side of a rock.
  6. After her big move, during the Eye phase, she will teleport again. The first time stay to the north (but within the Eye) until she appears, then run behind her to avoid Mistral Shriek.
  7. The second time she teleports during the Eye phase, get as far south as you can while still in the Eye.