GRRRRR! JUST SOLVED IT! In contradiction to every thing above, I spoke to Tonn and then just ran through every single mob to the first tower. Didn't kill a single thing. At the first tower, Tonn spawns beside you and blows the tower up. I kept moving, didn't kill a single mob and ran to the second tower. He spawned beside me and blew the the second tower up. I then ran through the caves, ignoring everything spiders and all. Got the the third tower and killed the Veteran, all thrall, any krait that came out of the water and their spawn. Meanwhile, all of the team (donkey etc) was back at the very first hill probably dead. Once all was dead near third tower - and I mean ALL, (but everything behind me was still alive), I moved foward and Tonn destroyed it. Another few undead spawned and Tonn helped me kill them. Maybe 6 mobs later, I could talk to Tonn and FINISH the QUEST! Meanwhile, on my map the entire team - donkey and all - hadn't even made it up the hill into the first cave, let alone to the first, second or third tower. From this, I would say that the biggest problem is not Tonn, but the team mates. In my previous TWELVE attempts, the donkey has sometimes ran back up the hill after the third tower. This attempt took me about 5 mins (compared to twenty when attempting to clear map first) as I just ran and didn't fight a thing until the end... Go figure.
