I did it synra's way a couple of times and never got it before level 5. It might be possible at level 4 if you avoid some exploration XP, but I can't imagine it happening at level 3. Are there better methods?
I am challenging opening the room with both of my character at lev 1 and both without lone wolf. And I could tell you that it may possible.
There is no secret to be so, just avoid getting experience as much as possible.
And if I'm successful, I will post the picture here. Just give me some more day, because I am an working adult, not a student with much leisure time.
Sorry for my poor language expression, I am a Taiwanese.