Yeah, it's a blood site, same as the normal brigand lair I think.
I'm glad to hear I'm not the only one making mistakes this game.... I already had bodyguards on all my slann. And on huehue as well as it so happens. But I went ahead and added bodyguards to more people that turn. I have to say, I wouldn't have thought your assassins would be able to take out two of my sacreds

. I don't really want to put 4 bodyguards on each commander in that province, it would be just slightly excessive.
As to the disturbing forge implications, I think clams are a pretty obvious direction for itza to go, what with my best mages needing to be summoned for 50 pearls a piece, and some of their best units also requiring pearls. Itza just bleeds them out. As for blood stones, well, let's just say my earth gem income has been pretty lame this entire game despite significant site searching and I didn't get enough time out of huehue to fix that. I would bet nehekhara has more gem gens than me actually. Alugra is probably clamming and stoning as well, and if he's not, he should be....
You are welcome for the time.