OK so i was in the area as a LV41 PUG today and figured I would give it another try since it was right there.

Got the Win 1st try. I killed about 6 mobs before the fight and saving TP after the 5th so I could open with a AOE skill. After that I kept my focus on healing my NPC, AOE skills and making sure the mobs were not facing her as I fought them off. After dropping the 1st one the other two seemed easy.

So I was able to get thru this mission today but I still feel your NPC needs an HP or DEF bump up.