Same as above, but instead of neutrals doing archons/devils, let them only do Angels/Demons. That way they have a heavy physical option, and a more utility based option (greater elemental).

There's even a roleplay basis for it, with the 'elemental prince' stuff that is in the Scion archives. You've also got Djinn/Efreet/Genie line that could be called upon. I don't know how popular this might be in your mind, but it's a nice idea to give neutrals some flare instead of making them some kind of 'jack of all trades' - which does not work out well at all when it comes to pleasing iffy servitors in conjuration :(

Yhorian