I have a two-fold character cast, I guess is the best way to describe it. The first group is smaller and is made of essential folks that really get exposure on the pages. The second group is the outer circle and they get some stage time but not nearly as much as the main group. I've already tossed quite a few from the second group to their deaths. I think before it is over, there may be a couple from the first group that will fall for the story, but I'm already making the lists of acceptable losses and unacceptables. (Yes, I make up new words!) I am finding how reluctant I am to kill one of these, it's pretty one-sided on that list. The single character I did try to kill off from the first group ended up being swapped out for a lesser known character. I couldn't do it.
Some folks think it is needed but shoot, I made a group for that reason. They can die without it being a huge loss. However, it is much more stunning and heart wrenching when it is someone a reader has come to care about and for that reason, I may very well move some names over, but I probably won't know who until the scene is being typed.
In response to your question though, yes, my story does require quite a few deaths. I don't think it is required in all tales. When it is a prominent character, I personally want to see it done for a good reason and not just to add to the body count.