I keep dying on limit break 3 (60-65 cap)

[lyndshade]

In quifom dome (think thats how its spelled) I get to a section where I have to pass the Ruby Quadav and 2 other mobs with it. Thing is the room is tiny and he never moves enough for me to pass and open the door. How exactly do I get this accomplished? I tried 3 times and each time I died due to aggro. I know he can see me through sneak and invis but just seems hard to solo this and so far I haven't really met anyone in game or have a linkshell to get some help. This is just 1/3 of it, I still haven't even got the 2 other crest I need and the guide I am following is like a page long of steps.. kinda overwhelming for a noob

Any other way to get passed this?

p.s. I asked a couple times on chat for help but no response >< been trying for couple hours now and died again -_-