What is up with this achievement.. 8 mins.. Seriously the NPC walks so slow its impossible.

NPC will stop the caravan 2 or three times and will not start back walking until 15 seconds have passed.. He makes it to the end always in 8:30.. 30 seconds to long..

I don't know about other companies but the gridania one is impossible.. The path is just too long and the last monsters spawn far too many.

Please post any tips if you have it because this drives a lot of us crazy.