Let's discuss Iris Havengard

I'm laughing, because this is exactly why the project died. Too many cooks in the kitchen. The simplest and most dynamic ability is Morph, because every enemy already has a morph pack.

Anyway, Lockirby2, let's run with the idea of M.Sword. What if it checked Iris's level (X), doubled it, and used that as a probability out of 255 for casting a spell of that element [2x/255]. Examples (pulled randomly from memory):
Fire = Flame Skean
Bolt = Bolt Edge
Ice = Blizzard
Water = Water Edge
Wind = Wind Slash
Earth = Surge
Poison = ???
Holy = ???

So if Iris were at level 30, and she chose Fire, she would do a fire attack, and then have a 2(30)/255 (24%) chance of also casting Fire Skean. At level 60, she would have a 47% chance of casting the spell. Too complicated?