Elementals. Just ditch the power armour and replace genetic engineering with selective breeding. (I.e. breeding stock is kept alive, unlike Clan warriors in Battletech whose genes might be passed on posthumously after they have confirmed their worth by dying with honour.) That should give some extra material (if you have access to Battletech books). Though of course, any bloodname things need to be removed, since Kameiras will not have a chance of becoming truly free. Though I would assume that any Kameira who survives their ops is made of the same stuff legends are, so if you see a Kameira Sergeant Major (Master Chief Petty Officer), chances are that he knows what he's doing. Ranks up to Staff Sergeant might be awarded based on training alone, but higher ranks would likely mean that the guy has survived an effective suicide. After all, when you can't afford to nuke the site from the orbit, you can still use Kameiras.
...and oh, you'd likely need to figure out a role for a female Kameira. Think about it, the future Kameira are examined for weaknesses since before they are born. Women generally do lack the physical strength of men. So unless they are going to serve the Amarr some other way (most obvious being, um, laying on their back, closing their eyes and thinking of the Empire - after all, no sense in letting good genes go to waste) I don't see much future for Kameira girls.
