With this spiffy sleek system I am thinking of seeing how far I can run a game. I am using the first two books and tweeking the following:
add an 'invoke deity' power that anyone can use. This is a lesser power than the Priest/Druid ability, yet it is commonly seen in mythology. 1d6+3+Wits+applicable ability to try to call upon their deity.
Color magic as per the old MUD The Reincarnation (was Archmage).
Snagging a lot from the original Black Sword Hack.
I even jazzed up the character sheet a bit.