While reading those log book posts, the bit about the hero has to be a terrisman of "pure blood," just jumped out at me for some reason, probably all this talk of blood and hemalurgy eh?
And as for the piercing of the hero, I don't think Alendi used Terrismen sacrifices to get his, I think he was given the piercings BY the terrismen, since they are the ones who know the prophecies, wouldn't they give the piercings of the hero to their chosen hero?
And Rashek thought that a Terrismen should wear the hero piercings so it doesn't make sense that terrismen would be sacrificed for them.
And further more, there were supposedly no seekers back then, so what was sacrificed to let Alendi hear the thumpings of the well? PErhaps for such minor hemalurgy (nothing compared to the inquisitors) it doesn't matter who teh blood belongs too, or what. PErhaps they just needed a goat or something. I don't think Alendi would appreciate human sacrifice, and he would have mentioned it in the logbook, I also don't think he would have gone along with it. Nor would the terrismen scholars. I think there's still something we're missing about the hemalrugy