Jerrybnsn wrote...
Unless............the ritual only protected one Grey Warden involved in the actual act, as she had to choose between Riordan's and you to live or be destroyed in the process. If you turned her down, she chose Riordan to save, but he ended up falling to his death. So your killing blow would kill you or Alistair or Loghain anyway. No wonder he was so, nope, nope, nope let me kill the archdemon, you guys stay back.
A) That wouldn't make a difference, because the Dark Ritual makes it so that whoever slays the Archdemon, regardless of who they are, as long as they're a Warden, doesn't die.

Morrigan specifically says that the Dark Ritual wouldn't work with Riordan. It must be performed with someone who has been exposed to the Taint for only a short period of time.
C) Actually, forget C. I had other reasons, like why Riordan wouldn't perform the Ritual, but reason B pretty much trumps that.