Go to the statue where Tiorpat Tornwing spawns, real easy to get there from zone in. Behind that statue(a few yards West) is a small clearing where you'll find a single pullable A Dragorn Laborer IIRC who is Dragorn Laborer's ph. Set up camp there, you'll have 3 (4 if you want to try & take on Tiorpat) named nearby: Dragorn Laborer, Granitsmash (ph is A Baleful Stoneworker), Ornaia the Foul (ph is An Elite Ikaav Scorcon). Respawn is quite fast, very good location to farm runes/ attuneable items
Ok - I went there and didn't catch that his PH could also be a Dragorn guard. The DG spawned RIGHT next to a quest NPC - which no one mentioned which gave us the willies. We gave up the camp and moved on, not being sure we were at the right spot.