Atheosis said:
Hyperbole aside, the chapters that have "dubious" histories or mutations, and have seconded marines to Deathwatch, all keep their dirty little secrets, well secret. So if you want to go out of your way to create a chapter that has battle sisters (wow does that sound dumb) they still aren't going to second them to Deathwatch. Just like Blood Angels don't second those who suffer heavily from the Red Thirst and Space Wolves don't second those with pronounced canis helix mutations. Beyond that the whole cursed founding appraoch to try and create a chapter that contradicts canon is on thin ice from the consensus viewpoint of chapter design. It's almost as bad as the lost legion approach.
Seriously dude just stop trying to shoehorn in your ideas into the canon, and just rewrite it. It's more creatively honest and will make more sense in the long run. Your ideas of how to fit it into canon are far-fetched at best.
Oh and by the way, neither the Mortifactors nor Black Dragons have ever seconded marines to Deathwatch within canon.
Every Blood Angel suffers from the red thirst to one degree or another. Every Space Wolf suffers from the canis helix to one degree or another. I didn't state they were sending those that had degenerated to ravening monsters.
I might point out that the consensus is NOT canon. (If it was, crusiers would still be 3 km long and have five to ten thousand crew) Further, if GW can use 21st founding to give us chapters of Space Marines who's regular battle brothers have superpowers far and away above the codex space marine (I'm looking at YOU Ghost Rider Marines, Wolverine Marines, Human Torch Marines), I see no reason that it cannot be used to justify female space marines.
Brother-Captain Artemis of the Mortifactors was a member of Deathwatch per the Inquisitor RPG. Though you were right, it was the Lamenters, not the Black Dragons, who were the other 21st founding chapter that contributed to Deathwatch.