Fortunately I like gathering and building as much as challenging fights, so after failing at WoF a couple times I've been content to take my time making stuff, gathering resources, and doing more thorough prep of my world for Hard Mode. I've gotten enough coin to actually get some decent specs by reforging all my stuff (took several attempts to get anything useful on the Star Cannon - kept getting minus stats on it over and over), I've been gathering hundreds of stars for the Star Cannon, I extended the WoF arena by adding some emergency run-off areas in case I don't down him within the length of my fancy Demonite Brick floor, and I've completed sequestering - above and below ground - all current Corruption. I've even built well-lit and enclosed tunnels to several Demon Altars for the first batch of new ore spawns. I capped these two pictures out of Terrafirma, a map viewer (no map editing that I could find, which is just fine with me - I prefer to edit in the world, block by block, while fighting monsters). One is the "town" I hope will be sufficient to protect NPCs from things like a Clown attack, the other is one of the less-imposing gate structures at the edge of a Corruption. The idea with the gate is I can be fighting mobs in the Corruption and run into the adjacent protected area without risking Corruptor spit contamination - glass wall goes all the way to a ceiling, and the wall below goes all the way to whatever depth grass won't grow.