Wouldn't it be simpler to make B like A, A like S and S like Odin. Also tack on an extra million health and a bunch of one shot mechanics. The Zerg would still be there but would take that many to kill it. Not changing spawn rates for A and S and lower Bs maybe. I doubt the Zerg will change since you have a chance of getting books from the monsters themselves. Why does everyone always want caps? Caps means less to do.

Pretty sure this a lot of what you said I just don't agree with lowering marks. There are so much grinding as is. I don't want a cap either