The campaign against Mystic Doors continues

But..if you door at the Chaos Zakum map, go into stage 1, log out, log back in on the appropriate channel, you never enter that map?

Yes, that does work, oddly enough. (inb4 Nexon "fixes" the CZak map too)
Only problem is relogging losing buffs you might be carrying (like, right now, 2x drop from Cassandra). But that's a choice one has to make.