This is a simple elementalist farming build that does not require any runes or Droknars Forge armor(though they help). You should be level 20 due to the attribute requirements though. Hope you find this useful.
Location: North Kryta Province
Target: Gypsie Ettin
Base Attributes: Fire Magic -10 Water Magic-11 Energy Storage-10
Skills: Fireball, Phoenix, Inferno, Meteor Showrer, Fire Attunment, Aura of Restoration, Armor of Mist, Mist Form{Elite}
Equipment: Fire eye(Optional), Fire Magic Rune (Optional)
Strategy: Travel north from Lions Arch going through the swampy terrain inhabited by bog skale. Run by using armor of mist and continue to the north-west towards the Ascalon Settlement. There you will find Ettin in groups of two or three, each being defeated in about twenty seconds. Before you aggro them cast both aura of restoration and fire attunment, then get their attention and cast mist form right before they start attacking. After that target the ettin in the center of the group and in order cast meteor shower, fireball, phoenix, and then inferno. If any ettin managed to survive that finish it with a fireball. The most valuable drops you can obtain include warrior and monk superior runes salvaged from ettin pauldrons which are commonly found.