@farothel: i don't necessarily agree. Binding a weaker spirit has its uses, just usually not in combat situations, as they are not as badass as their bigger brothers. Of course, if you want to be very successful at binding, it might be worth to spend Edge on the test, but not obligatory. Don't forget, that you only have to get a single net hit for binding, and the spirit keeps its services from the summoning test, adding any more net hits on binding.