Hot on the heals of our Iron Council hard mode kill (ie, the very next day), we managed Orbit-uary, defeating flame leviathan with all 4 towers up. All we had done previously was 2 towers, and why bother with 3 if you can jump straight to 4!

This kill has edged us into the top 250 guilds worldwide. Not that we're into that sort of thing, but it does give a bit of a epeen growth spurt.