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.