This rune's ability set is solid. The only thing that needs tweaking is his Attack. What is it, 10, 12, what? It should just be changed to 12.
What's fun is playing a Ravenspeaker against him, boxing the spirit in with all your ravens, and getting an unending swarm of ravens. He is a bit much, I'll admit, but I see the problem as being ghost, not the projection.
My main problem with the design of Projection (on both this and that one Garu) is that I cannot see the stats of the projection without starting up a game and playing the unit. Maybe there could be some kind of tooltip or ability on the rune itself that denoted the stats and abilities of the projection.