Simply get a priest and this item, Draenei Fishing Net - Item - World of Warcraft, then get inside BT or your desired raid boss etc... and go to the mob that is locked, for example, on Tox1c, Illy is locked because akama was deleted, using wowemuhacker if needed
next, spawn a murloc using the net (double click it fast as much as needed)
Mind control the murloc using priest
Attack the mob (Illy in this case)
Voila, aggro'd locked mob
Now he functions like any other mob. This works for any mob you can't attack... actually. ^^
Working on ascent 4.6+... tox1c-wow as well.
In order to reach Illi, just adjust teleport boxes on WoWemuhacker... or when you have entered BT, teleport to this location (which you may add to wehteleportlist.ini if you wish)
[Illidan]
Root:=OutLands
Child:=Raid
MapID:=564
xPos:=779.899048
yPos:=306.403168
zPos:=319.709839
This hack is Alliance only, however it can be used by horde too if you can just get a mob to whatever you need to attack... however it's not possible to get one thru the door to illidan, aside from somehow spawning one there, which may be possible...