You've never heard of FACES before? Every mage has to get his game FACES on every now and again.
Sonic doesn't get much love because there's no such feat as Energy Substitution (Sonic).
I'm not sure what you mean by "combines them." Do you mean a PrC that requires levels in four other PrCs as prerequisites? I've never seen anything like that before, but it's somewhat intriguing. I have no idea how that would even be done, though.