I like the endless wave of mobs idea. Promotes role improvement for regular play too. Gives to thoughts like: Grab aggro quickly. Pull as much DPS as you can before the next wave. This fight doesn't ever end. I have to use my MP sparingly. I think we need this mode in addition to more turns of Coil per update. I do like the new currency that is coming though. It will provide many with stuff to do way past 2.3.