I really like the idea, as some people said previously, we had Runatorium which was a nice new content to the game PVP-wise, having Makarna would be the PVE-counter.
Also I agree that we should not implement real Makarna gear, that would destroy the balance of the game introducing 4.8 gear in a 4.6 patch, but high level manastones or enchantments stones would be really cool!