In the tv cartoon Avatar: The Last Airbender, there is a character, Mai, who throws knives. Theres another character, Ty Lee, who does acrobatic stuff too.
I agree that the bacteria in the mouth probably wouldn't be helpful. Yeah many of the practices seem backward back then considering they thought leeches cured everything. They also would continue to use bloody medical supplies over and over again.
Really well thought out magic system! You said these were magic sytems for the humans, so are there other races? If so, are Augers able to drink other races blood or animal blood? Or just human blood?