Anyway, I think a "Morpher" that starts with a book of morphology and a wand of polymorph would be interesting. Giving them summon butterflies as a starting spell would also be interesting as they can polymorph them into more useful allies.
Butterflies are HD:1. So this class would basically have a "summon low-HD-monster" spell that takes two turns to cast for the first time and one turn for subsequent "summons", until the butterflies are all polymorphed. This might be decently strong on the first few levels, but it will soon become very weak. By Lair, it will be a useless spell combination.
Now, this isn't actually a problem per se. The same thing is the case with other spells (Beastly Appendage, Call Imp, Flame Tongue...). But there's more: Polymorph Other is level 4, meaning that until XL 4 at the very least, they'll need to rely on limited wand charges (not enough to kill the monsters with this spell until then).
The only other spell that they have that will actually kill standard monsters is Sticks to Snakes. This solves the above problem to an extent, but it also lacks strength past a certain time in the game (I'd say it's still good in some points in Lair, though). Otherwise, the Book of Morphology is completely useless at killing monsters that aren't poisonous. The other books have a progression to usable, strong* higher-level spells that continue the class flavour.
This class' flavour (polymorphing butterflies) is restricted to early D levels (and even then, you have to be XL 4 or more!), and the starting book is pretty much useless by then. What is this class? Sadly not more than a bad summoner - Call Imp is way better than this butterfly "trick" - with some really weak higher-level spell in his starting book.
*unless you're a Stalker, in which case it's a pity you exist because that class should really be removed
Really, we've used up all spells that are interesting and strong enough early on, without being overpowered (for instance, IMB for Cj would be a really bad idea balance-wise). The only thing I find sad is the removal of Silence from every book. I think it could fit in with AM decently. Please make it non-Air for that purpose though (maybe L6 if that is too strong). Enslavement really doesn't fit in there anyway, because "inner flame and then enslave" has nothing to do with the AM flavour, which is shooting at things you have weakened with Hexes. AM is strong enough without the combination anyway - Cause Fear is good enough for that.
Phase Shift is another spell that is interesting and good, but not overpowered. However, the only book it fits in flavour-wise is Sk's, and the only book it fits in spellschool-wise is Wr, and the former is impossible for obvious reasons while the latter would really make Spatial Translocations even more overpowered. So there's no way in there.
Otherwise, we have a class for every single spell school. It is pretty much impossible to design a class without redundancy - it would, like AM and St compared with En and Tm, have to bring out new possibilities in a spell school already used.