Valley of the Dinosaurs (12-30 quest)
This is the quest that goes to level 30 as far as I'm aware. I think a few things would be nice:
1) The overall numbers be increases by 20-50% for what spawns there, and the levels of the creatures increased by maybe 1-2 each.
2) The loot in the quest area (specifically the hidden areas) be brought up a tier or two. The chests at the very end that all can get to are the highest tier chests, where the hidden ones are maybe 3 tiers lower?
3) If anything was to change, the end boss "Keeper of the Bones" needs a significant buff. The spinosaurs before it are probably 4-5 times more powerful than it (and two spawn, at that!). The Dragon kinda just flops over and dies