@Kaleo: We just used the Team Fortress classes to give people something to latch on to, because the other terms are so new.
We don't need to so literally place a particular Egyptian deity or demigod in each role. Did you follow my link to the Ogdoad? Have you heard of the Hyksos? Ancient Egyptian history spanned at least 3 millennia, some would say twenty-five. Plus, we're talking about humanoids or aliens visiting Earth at some time in the remote past, probably before "recorded" Egyptian history, and if they were ancient astronauts, they probably visited many areas of ancient, prehistoric Earth, which is why records of them have become encoded in widely-scattered myths and the most ancient tales and legends of many cultures, from Atlantis to Aegypt, from Eire to Nihon. Just because we are using these manga terms doesn't necessarily preclude an Atlantean/proto-Aegyptian/Sea-Kings/Golden-Age-Ur-Kultur. I thought that when you were posting the Egyptian links to gods with creature heads that match these beasts (jackal, alligator, hawk) you understood that these would be much more broadly interpreted. Also, don't forget that this is TWO THOUSAND YEARS in the future, and TWENTY LIGHT-YEARS from Earth. National cultures, indeed, international, nay even interglobal cultures will be so inextricably mixed and confused, warped and distorted by being constantly retold and morphed in games, art, music, etc.
tl;dr: Don't be so literal. Just blend the overall look of Atlantis/Stargate/Egypt with Japanese folk demonology and Greek mythology. We're not retelling Egyptian mythology. We're just making some kewl player models for a game where all the Humans look alike, and the Aliens are some kind of dinosaur bugs. No-one really cares that much about the back story, anyway. They just want to frag enemies and rape bases.
Cheers! Thanks for putting so much thought into it, but let's not reinvent the wheel. Let's not try to exactly match any particular pantheon, unless it's something like the Ogdoad.
Priestess - fox-woman [female]
Artificer - dog- or jackal- or wolf-headed man [male]
Naiad - mer-wench [female]
Nereid - ditto [female]
Merman - a dude with gills and a trident [male]
Mer-centaur - a centaur with some fishy characteristics [male]
Shojo - a monkey-king drunk-monk character as a woman (they never had drunk Egyptian priests? there aren't monkeys in Africa?) [female]
Evolute-Oni - a giant with a club [male]
Evolute-Tanuki - hyena/dingo/raccoon-dog war-wizard [male]
Certainly they can be done in a faux-Egyptian, manga/anime style. After all, in this game engine, they're gonna look pretty chunky anyway. It is a shooter, and it is about frame-rate.
Also, if you doubt that there was a culture that spanned so large an area in the pre-historic era, I would draw your attention to the fire-drill symbol, megaliths, the Tarim Basin beginnings of Chinese culture and the proximity to Sumeria, the unexplained ethnicity of such groups as the Ainu and Tokharians, and the wonderful works of Martin Bernal (Black Athena), Marija Gimbutas (The Goddesses and Gods of Old Europe), Riane Eisler (The Chalice and the Blade), and others. Not to mention Zechariah Sitchin, and others of the post-van Daniken milieu.
So, don't be depressed. Just don't try so hard to squeeze the square peg of this mod into the round hole of a specific period of the 3000-year history of Ancient Egyptian Religion. These folks came about 25,000 years ago. Our ancestors completely garbled the stories about them, which were further mis-interpreted by ethnocentric, anti-Semitic, anti-African W.A.S.P. 19th Century north-western European men with little or no working knowledge of the ways of either ritual magick or ancient mysticism.
Be of good cheer. You will get your Atlantis/Egypt/Stargate motif. It just will be filtered through a lens of Warhammer/anime/manga, and presented in a Quake-engine mod of a mod. The gods will be honored, not angered.
Lastly, it's not an Egyptian setting. It's a future culture that transcends national, international, global, interplanetary, solar, interstellar and meta-temporal boundaries. Free your mind, and the rest will follow.
Cheers, mate. I'm trying to accommodate your wishes. Follow the thousands of links I posted, and research some of the Japanese terms. I think you'll find plenty of overlap, and areas for a broader, multi-cultural approach.