I like the idea of deadman, It would just have to made where these dead man players wouldnt be able to just camp every spot for good drops ingame like they do in osrs. as this would interfere with IM game mode players. It would have to not be worth while to kill anyone who isnt on your DMM game mode. or reduced damage or something.
If you had a normie or ironman out in wildy. Could make it to where DMM can pk with them, just only in the wild.