Hmm, how about an invocation that duplicates your foes? It might not be quite so deceitful, but pulling a dragon out of your hat to go toe to toe with that Red chasing you doesn't seem like much of a stretch.
Also, no Invisibility invocation?
A Silence invocation might also be useful.
A means by which to gain flight might also be useful. Phantasmal Steed being the easiest, but not everyone wants to be mounted. Phantasmal wings could be interesting.
Phantasmal Killer would probably be too strong, but I could see Color Spray, especially if you broke up the invocations into different grades and made it the second grade or something. Maybe a bigger one for the prismatic line.
Then again, that starts going off into a direction thats more just any illusion and not images and stabbity-fun focused. So, you can probably ignore half of that. >.>