This zone is comprised of 4 levels (4 including the entrance.)
After zoning in, head up the climbing wall and this is where the first mobs are.
All mobs on the second floor are linked with 2-4 mobs each.
Once a path to the elevators is clear, then head up the elevator to the 3rd floor to spawn either Gorenaire or Talendor at the time.
To spawn Gorenaire or Talendor, there are two statues. Summon Guardian of Ice will spawn Gorenaire, and Summon Guardian of Fire will spawn Talendor. Only one of the two names may be spawned per run, so yeah you can't kill both in one instance! [EDIT 10-JAN-15 It appears you can now do both in one run]