Ok, I think I get what alignment each of the fiends is now. orange= LE; purple = NE; and yellow = CE. don't you think? look at the souls they each tout, and the second-to-last panel.
Still not sure how this splicing is supposed to work. One specializes in a barred school, another does arcane casting. Necro might be the other banned school, I forget. Just remember conjuration and thinking, "wow, V's a moron!" I guess with this splice, V can use te barred school(s), cast epic, AND spontaneously access every single spell known between the four of them? Man, that sounds awesome.