Something I'm unable to work out: How well do watcher spirits "watch"? Can they see people approaching in realspace? (I'm ruling yes, since all life is visible on the astral to the astrally perceiving). More importantly, how far does their vision extend, and how well do they see through obstructions, magical and non-magical?
I'm thinking if they're force 1, so INT 1 and no Perception, they must be nearly blind unless something living brushes by them? Or what?