Blotchy Fur on a bat

Hello I am creating my first Blender model and its a bat(flying) with fur. I am using a particle emitter with Materials and Textures to create the fur but its blotchy. I weight painted everything, created the vertice groups etc… and the only thing that make it better is increasing the amount
but that really crushes my pc…I do have children applied but its still blotchy. Combing helps a little but since its bat fur is really small and fine its tough. Any ideas or help is appreciated.