Please... don't work on something that is not needed for the server, rather fix the god damn problems the server has
I've been waiting for this to happen, I was going to suggest it because of the less lag issue we were having at /warp mob
It should be possible for the plugin to detect what the cause of death is. Taking that to the next step, calculating the appropriate estimated drops for the amount of mobs merged. I don't know if something similar was suggested, but I can't be bothered going through all the pages, so.