Soldiering would probably lead to lots of access to human blood.
I'm not saying that's why the Orthodox sects attacked us. They were probably just jealous. But it was how they justified the attack. Unless we get a stronger backer we should stay away from human blood. At least on a sect wide level. We might try it out personally in private just to see if it gives the kind of power boost that seems likely.
I think even trying it is probably not a great plan outside emergencies, there may be some way to tell we've done it.
Honestly if there was a good clear way to tell if someone has drunk human blood I do not think we would be in this situation. Because the elders could just demand to be tested.
At least not in small quantities. It has already been shown that drinking enough blood gives you the characteristics of an animal. And while who knows what the characteristics of a human would look like when layered on a human I bet it would be something uncanny enough for people to tell.
Soldiering might have been fun if our only other really fighter wasn't injured and the other three girls are our bestie, follower, and decoy
We can be careful about the attempts, heck we have Old Chang that could be designated to try in secrets with the rest only observing the effects, until we are reasonably certain that it is safe / doesn't have detectable signs.I think even trying it is probably not a great plan outside emergencies, there may be some way to tell we've done it.