I'm playing a Shamanist. the rules say that means i can only summon spirits i get bonuses for.

Does that prevent the character from summoning watcher spirits? MITS says "magician" with conjuring can summon watchers. does that mean anyone with any mage, or any magic user? or what?

i know its a stupid question.. but thanks

Magician is a general term for magic users, either Hermetic or Shamanic and all the ones in between.

If you are a magic user that can summon you can summon watchers. It's kinda like elementalists. Health spells are open to users of any element. Watchers are in that area, not a specific type of spirit and not shamanic or hermetic in nature, so they are open.