I dont know how important this little fact might be so I'll sahre it just in case.
If you look in the valley near the Vendo campgrounds for a pack of Rabid Sveawolves hang around for about 10 minutes (real time). Rathis and his 3 pals don't seem to like the wolves very much, and they attack them on sight. If you havent been thinning the herd, then there will be quite a few wolves there to distract Rathis's friends while you kill Rathis and make a getaway. It made finishing this much easier for a 15 Hunter.