Vanquish the Betrayers: Benedict Location and Keep Route

Vanquish the Betrayers in Tiragarde Keep: where Lieutenant Benedict is, which building pulls two sailors at once, and how long the quest is.

TL;DR

Accept Vanquish the Betrayers from Gar’Thok in Razor Hill. Kill 10 Kul Tiras Sailors, 8 Kul Tiras Marines and Lieutenant Benedict inside Tiragarde Keep, then turn in to Gar’Thok. Observed.
The little building at approximately 57.2, 53.0 pulls two sailors at once. Do not pull it alone.
Sailors and marines run when low on health, so kills take longer.

Quest length: Medium (observed).

Batched run: done together with For Honor in one trip (observed).

Accept Vanquish the Betrayers from Gar’Thok at Razor Hill, Durotar.
Head to Tiragarde Keep, a short walk from Razor Hill.
Lieutenant Benedict (level 8) is in a building at 59.2, 58.1, with sailors and marines.
To reach him: go right when you enter the building, go up the stairs, then left again up a ramp.
Sailors and marines are sparse inside the keep. You have to run around to find them. For example, a group at approximately 57.6, 54.2.
Level ranges seen: Kul Tiras Sailor 5 to 6, Kul Tiras Marine 6 to 7.
When all three objectives are done, walk back to Razor Hill and turn in to Gar’Thok at 52.0, 43.5.

The little building at approximately 57.2, 53.0 holds 4 sailors and they are aggressive. Shooting one pulls two. Do not pull it alone.
Sailors and marines run when low on health. Kills take longer.
Group up if you can. A party made the marines and Benedict much easier.
Finding targets is slow. Sailors and marines are sparse inside the keep, so expect to run around between groups.

Paste into chat with a waypoint addon that supports /way.

/way Durotar 52.0 43.5 Gar'Thok

Rewards: not yet confirmed.
Whether the aggressive-building behavior and the pull-two result repeat on another run.