All this talk about invading the Zuma is largely a moot point anyway (no pun intended). They exist for a reason. I doubt that reason is to be a punching bag. In much the same way that Tom made it effectively impossible to take back Jobo's Mouth from the daimons at the end of the Third Invasion on BT, I have a feeling that, in the unlikely event that it looked like the players might actually have a shot at taking down the Zuma, Tom would intervene and prevent it. Not overtly maybe, but let's just say that I doubt we'd ever see the bottom of their reinforcement pool...