See I read Conjuration the opposite. First you need to buy conjuration for 20 poi ts then you need to spend the points on the item. So you end up being better off with pattern for you item needs. (Which I think was Eric's intent).
Ontop of all the time it takes to actually conjure the item. It didn't seem to be a power useful in an action movie, unless you cut in an A-team montage).
Sorcery is the one I have seen most abused.