My human monk took about 19 stacks of 100 bone chips to get to non KOS. Mozo used to rotate and see someone sneaking to turn in bone chips (Field of Bones). Lately I have not seen min turn to see me sneaking in near 2000 bone chip turn-ins. (note: one chip per slot 4 total per turn in)
Also the easiest way to get to mazo is POK to Calbis POK stone, use a cloady potion to position yourself in Mozo's right side (corner near golden urn) press sneak then give him a bone to check distance.
I did not have any of the other mobs that walk bu agro on me while turning in the above mentioned number of bones. Also expect agro when you leave and the sneak fails once you get some distance away from mozo (so have FD ready) Never tried to use a cloudy potion to leave.
Confu (Prexus)