Like you did with Mortorn long ago, you wreck Emerald Forest.

37th level rangers now camo to protect 23rd level mobs? Come on. Emerald would be a great place for baddies to rank, but you go and nerf it. Why oh why nerf Emerald Forest of all places? It's a bit silly to make the rangers assist the dryads, don't you think, or any of the other mobs.

Take the assist off. Give baddies this ranking spot back, because there were a lot of good fights there. Now it's pretty dead, for the most part. What was your biggest issue with it? It wasn't an insanely easy ranking area, comparatively. You want an easy ranking area, go to the Forbidden Forest, which should probably be nerfed if you're making ALL ranking tougher.

Regards.