I'm not at a computer where I can install the character planner ATM, but generally speaking, you can skip the 2 invisibility powers in illusion, and possibly fallout in radiation. Other than that, hasten really helps keep your phantom army up as often as possible. If you plan on doing a lot of soloing, then keep in mind that illusion may be a bit tougher to keep containment on enemies, (particularly bosses), since it lacks the mag 4 immobilize that many other control sets have. Still, you wouldn't need to tap into sorcery or another pool for a dedicated attack, since you have spectral wounds, (just slot your single target hold for acc & recharge, and spectral wounds for acc & damage so you kill enemies quickly and avoid the health recovery they eventually get from it).