That could work. But what I'd really like to see is a band of higher resolution mesh along the hairline, over the forehead and along the temples.  So you could make the hair very dense there, and avoid that wiry Barbie look. 

The back looks good.  I like the idea of having separate upper and lower groups on the back of the head.  Hair growing from the lower back of the skull isn't very important in most images (though you'd miss it if it weren't there!)  I like the idea of being able to make that coarser, with fewer vertices, and save resources for more visible hair over it. 

Have you see that "Sexy Manga Dancer" video on YouTube?  He says he used three hair groups, but only ran a simulation on one of them.  You can see that if you look closely.  When the dancer turns her back to the camera, you see a chunk of the hair in back going through her body.  It's dynamic hair, used statically.  With most renders, it wouldn't be noticeable.