White Rhino is a potent, Indica smoke at a 22% THC content. Make some hash or oil using the buds, and that % will probably easily double or triple. Some claims say making "budder" has a 90-100% THC content. God damn I say!

For the most potent out of those 3, I would say WW, but if I had a choice, I'd pick the Blueberry hands down. It is still very potent, but it smells wonderful, and tastes even better. It is a very pleasing smoke.