I finished second part( and final part) of bruiser quest today.
*Does happy happy dance*
Ok so she tells you to go down to Serpent sewer after you give her the note.
First thing you do is head to bigbend, and enter the theives way from there, then u head strait north and you will find zone entrace for Serpent sewers.
might wanna have a lvl 23 person come along with you just so you dont get any aggro while on your way to storage room, though you could most likely handle the mobs on the way there, still make your life easy and ask a friend for help, or a stranger^^.
Once in the sewers, from the thieves way entrance, you are going to follow the left wall, there will be one turn off but its a short dead end, just keep following the left wall. You will quickly come upon the entrance to the storage room.
Once inside you will find a ring of about 10 or so Dervishes, and one large blue con dervish in the center... seems like hes in some kinda boxing match.
Get ready throw martial focus and toughness on then step into the circle and the big blue guy will attack you. kill him... duh. about at half HP two of the Blueguys friends, the dudes standing in the circle will jump in and start to attack you. dont worry about them finish off the blue dude first, then quickly dispatch with the lil buggers who decided they wanted to die also.
I waited till lv 19 to attempt this part because at 19 you get a kick *** ability known as Rapid strikes.
You can most likely complete this quest at 18, however do this at your own risk.
I finished the 3 mobs off and the rest ran away, thank god, and i had about 55-60%hp and 30-35% power left.
I had two nomad walking sticks equiped as my weapons.
Good luck with your quest guys.