Well you have to be an ally to farm her, and i do not take any credit since i copy pasted this from wowhead.
Hes farmable because you lose aggro in her room.
*Note the guards in the hall to her are level 20...
*Channelers cannot be killed and do not attack unless engaged by an enemy. I.E. you get them to 0 HP and they do not die, they stand there and attack you for like 20 damage and annoy you. They disengage once you get far enough away, which is generally all the way back onto the street upstairs.
*Horde can attack you from the channelers posts as well as from upstairs in the circle hole from the war room.
*The Magister standing next to her is level 60 and does nothing special, just 2 shot him and get on with things.
*Drops 50 - 100G (75G Average) and NOTHING else, no trash, no lint NOTHING just 50 - 75 G.
*6 min respawn
*1 Million HP and change
*She does not Bleed, i.e. no rake, rip etc.
*Getting there is easy:
Mount up and ride there - continue to ride once inside the city from Silvermoon main entrance and follow the main road right all the way. Once you get to Farstriders Square as the Road turns left you go to the building on the RIGHT in the CORNER with BLUE DRAPES. You do NOT want to go to the War Room, NOR do you want to go to the building straight north. You WANT TO GO to the entrance to the RIGHT with the BLUE DRAPES.
*Also note, if you DO NOT go inside and downstairs once you get there, GUARDS will continue to respawn on the street upstairs. Champion Vrenesh also patrols as well as Arcane Guardians. So go DOWNSTAIRS FAST.
*2 maned her feral druid and shaman, she hits for nothing. Took 50 minutes.
*4 manned her got it down to 6 - 7 min
*Ideal group is 4 man for money versus gold.
2 man 50 min (37.5G/Hour)
3 man 20 min (50G/Hour)
4 man 8 min (80.3G/Hour)
5 man 7 min (69.2G/Hour)
Have fun.