As few as possible.
The more groups u use, the more possibilities to mess up and end frustrated and give up. It is by far the hardest and most difficult room in Poser and could use a complete work over.
"As is" ; it hardly gets any use at all at end users level.

I have been looking at some Blender hair video's lately and it looks quite controllable and productive there.
Will have to do more tests.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!