Black Spire - 100 Floor Mega-Tower w/ Scaling Bosses

GGG mentioned they're working on fixing endgame maps for 0.4.0, one idea for towers is to add a new tower variant, called "Black Spire." The Black Spire would be a mega-dungeon with 100 floors.

There are dedicated “Safe Floors” every 10 floors that serves like a small town within the dungeon environment with Vendors and Waypoints. To understand the sheer scale of the Black Spire, if a player took 3 min per floor to clear including defeating floor boss, it would take roughly 5 hours to complete.

Each floor would contain a boss, and the bosses get harder with each passing floor. Reaching floor 100 would be a feat unto itself, with the boss fights being a truly epic challenge. The Black Spire would have an associated leaderboard that ranks all players with highest floor achieved.

I would love something like a tower with bosses per floor. No mobs, just boss fights