PLEASE PLEASE PLEASE avoid the hordes of brother agents with the standard issue 'blaster wands' and 'protective amulets.' DEMON has always been distinguished from Viper and other generic agencies by their use of magic instead of technology, but what makes magic distinctive is that it is NOT uniform, mass produced product like tecnology is. When you take this aspect away from magic, it loses its flavor and seems just like tech. Agents with a 10dd EB and 6/6 armor feel very much alike, wether you call it a blaster or a rod of hellfire.
In the past DEMON has emphasised the individuality of the Morbanes, and I think this needs to extend to the cannon fodder level characters as well, since they are the ones players interact with the most. In my campaign the grunts that a Morbane uses are indivdually tailored: An transmuter might devolve his followers into super-strong beastmen, a necromancer has zombie hordes, an demonologist uses packs of hell hounds, an enchanter has golems and magical constructs, etc. One agent tends to be very much like another no matter how much a GM tries to give them their own flavor - but throw some mystic gargoyles at your players and they WILL stand out.