I was going to take Lydia on that particular adventure; glad I didn't.
J'zargo is the first follower I've had die but not resurrect. I figure it ads a "realistic" dimension to the game.
Do you resurrect your followers or reload to a previously saved game; or do you just let them stay dead? And how many have you allowed to stay dead---I mean for one particular run-through; not a total over 5 different ones.