elytras make it pretty much impossible for the user to be killed, if i go like in render distance, they just fly away at max height. hades is a pvp zone so you should be able to fight people but that's kinda hard because all the people are flying around out of my reach. defeats the purpose of a pvp mine.
theres nothing wrong with invis though, just annoying
for S4 hades: dead people's loot should drop at least somewhere like the 3rd and 4th layer.