You shouldnt mess with stats/skills as it is way more punishing for grinders. There is already a opportunity cost since you cant creature fight while dead.
I dont believe that someone with less that 1000 attack will care much about a % skill damage, while for someone with 100k or 1m attack will matter more. If you make it a plain number, then its less punishable for grinders and more for everyone else.
I always liked there is a work around for more things in MD. What is the work around to avoid getting killed? You can get killed while being afk in GoE just because someone has a kill tool, what is the counter play? Now you want to make it more punishable for the weak player that lack the tools to fight back?
If killing is so easy, why shouldnt resurrecting be as well?
If you want to stop trespassers in NC, change things so it stops being the joke it already is.