15 troll shaman: Guk, Unrest or Kurns?

[Morlocken]

Hey everyone! Old, returning player from Torvonnilous here. I started a troll shaman and found some old friends playing here, so I got some twink gear, plat and a fungi for loan. This means levelling is quite nice but I thought I should speed things up a bit when I get to 15 by going to a dungeon. I never did much low-level dungeons (except Blackburrow) on live and now I am deciding between staying in Upper Guk or going to Unrest or Kurns. Which one would you recommend and why? I will buy all spells up to 29 first so it would be nice to find a place to stay for a while at

Thanks in advance!