Here you go: http://www.bluegartr.com/threads/104...-SP-quot-Chart

The variance in base SP is perhaps too high and doesn't always make sense. Raptors of all levels have a base SP of 150, which makes them attractive grind targets, however, Kobolds, which I find to be a stronger monster family, only have a base of 100.

Even the highest level mice only have a base of 63, so they give very little SP despite putting up a decent enough fight.