Advys don't have AS support?
We don't have the evades, runspeed, epic perks, etc. to actually make us as good as an Advy. At all. You seriously must realize that casting BoL and a better Wolf nano does not make us an Advy or even in the same league as an Advy. It just gives us some reason to move away from Mimic Doctor by giving us more defensive nanos to cast.
You cannot balance FP around the idea of "well that's the top nano in my line so you can't have it Agents." You have to look beyond that and really think, will this OP agents? Will this make Agents as good as the real profession here? I seriously doubt that an Agent with the top wolf and BoL is going to hold even a fighting chance in situations where the Advy would come out at full HP.