Honestly, the Quest was Easy for me, but you gotta count in the factors that made me wipe them on the ground
1. I was prepared for a big group of people coming, because you told me that is what will happen, The regular player wouldn't expect to be ambushed by that many people, and if my experience in other mmos has taught me one thing, its not the number of enemies, its how prepared you are before you fight them.
2. I'm Extremely talented when it comes to any kind of game.
3. I'm Probably a higher level than the average person who's gonna be doing that quest
So yeah, It was easy for me, although i had 3 huge advantages.
If you want, you can implement a Bonus round, once you reach the bonus round, its impossible to fail the mission once you reach it, and the more you kill, the better the reward. Or, You can implement a Level balancing system. Maybe make them 1-3 levels lower than the quest starter (Most likely 2) and balance the Person your escorting also, because then he might get killed to easily and make the game impossible for lv 20-ishes, but its impossible for a lv 20 to exist ATM so...yeah.
Also, If you Lower the Damage of something, i also recommend you lower the cost. Because now Trash isn't worth the 75 fury it drains. I Suggest lowering the cost to 50 or 60.