All you need is an Ice Mage Level 79 Rested EP and 3 Hours Time.
In Brunnhildar Village Starting Area you get a quest where you transform in a Warmaiden, fullfill this quest to get the quest and you can start to grind in there.
there are 4 mob groups with like atleast 5 mobs. They dont aggro you unless you attack them.
Every Group gives between 10-14 k rested. During highpeak times the spawn is almost instant. So all you have to do is to run from group to group and get kill them.
I use 2 Arcane Explosion and than Frostnova -Blizzard , it goes quite fast and i earned in like 3 Hours my level and like 2 k Gold... (Enchanter , Tailor).
They are humans and drop cloth and greens so have fun.