Lets say you went to westfall.. you pull the lowest lvl mob you can find..
(Done with 3 ppl.. 2 priests and a rogue)
Those 2 priests keep mindcontroling that mob, and when you see he starts to evade or resist your mindcontrolls... someone with engenering has to mind control him with a gnomisch mind control cap, so the priests can mindcontrol him again.. and then keep walking to 1 of your maincity`s..

First, Priest1 starts to mindcontrol the mob and moves to priest2.
When the mob reached priest 2, priest 1 must close the mindcontrol and priest 2 must mindcontrol him asap... then priest 1 wil move forward and priest 2 will move the mindcontrolled mob to priest 1.. etc.. isnt that hard.. then whenever a priest`s mindcontrol gets resisted, use your gnomisch mindcontrol helmet to Mindcontrol him ASAP, and do wat you were doieng again..

Use the mob to gain fighting skill

Yes it works well, i sugest u use it on the Servants found in the blasted Lands, even though they cant be killed you can drag them to stormwind. Great for leveling up your weapon skills

Concerning the Servants, they always have to get punted by a GM, its kinda funny while they're there though!