I've returned to the Glade and I'm going through all the old Ranger quests.
I had been clearing the Undead/Ghoul camp in the south-eastern corner of West Karana (with Ghoul Yeoman, green to lvl 25). The Ghoul Messenger came up on track for me as I sat at the North side of the camp. Not sure if clearing the camp helped. I started running north-east towards him and he was running towards me. I killed him at -2770,-14840. I am level 25 and he is level 27. I won the battle with 1 bubble of HP left. I have Trueshot armor, random leather armor besides (I'm avoiding the Defiant gear), the Faydark Champion's Long Sword, and a bronze short spear.