Make the nightmare zone lvl joinable by rankings like Elite up to Mercenary etc. for each lvl and not cp. Or simply make the cp balance better when higher cp players join the low lvl zone just to satisfy themselves. I assume that everybody is ok getting killed by another player when they are almost same cp cuz the other player its just better, but not getting 1-2 shotted by higher cp players, cuz then it doesnt make sense to have different lvl of zones since there wont be any "fair" fight between the players who try to keep their spot.