Bone Chip Quest
 

At what level does the Bone Chip Quest in Kaladim start giving you xp returns that you would be better off gathering elsewhere?

Currently lvl 6 enchanter.

Depends on how many stacks you have. If you 40+ stacks goto town and burn em all up if it's only a few then go somewhere else.

easy ride to 12/13 then orc scalps

In a way it depends on how quickly and painlessly you can hand them in. Obviously you don't want to overstrain your body to make xp, and likewise you don't want to waste time if you are really slow at clicking about.

Every 4 bone chips give around 7777 xp. Going by the wiki it takes about 1,500,000 xp to go from level 6 to level 12.

5 backpacks of bonechips will take you from 6 to level 12.

Thank you both for the solid info.