with the hairthing i can help
it depends on how you want the hair ... lying on the minis back, or flying in the wind ...
For the case of flying in the wind, drill a hole in the minis head an clue a thin wire in it. Then move the position of the wire the way you want the hair. Now you shouldsculpt a thin layer of greenstuff onto the wire. Wait until it´s hard enough to proceed (up to 2 hours) After it is hard, put a new layer on the greenstuff on it a give it the form you want. Wait some time, about 20 min and give it a structure with a needle. This should look right.
Could be possible, that you have to do this in seperate steps, cause it´s a bit problematic to do larger areas of hair like this, without ruining the texture ...