>>392370214
>>392372471
What I like to do is make the hair bones and hair mesh separate objects then set the mesh as the child of the bones while picking the "automatic weights" option. Then the weights will be done automatically, and they work out pretty well as long as the bones are in a reasonable place.
Then you rejoin the separated hair bones with the original armature which will automatically join the mesh as well, then put the bones under the correct parent (in this case probably the head bone) in the armature.