It's been fun to see everyone enjoying the new endless mode, and completely breaking it in various ways!
We've identified a couple issues that we wanted to address, so that towers don't completely outscale the difficulty of the enemies (especially on the later endless levels). With these changes, we're also resetting all endless leaderboards.
Full changes below:
The enemy health multiplier now scales faster after reaching wave 30 in endless
You can now only spawn one early wave ahead of your completed waves in endless
Accelerated waves in endless mode will now have less cooldown between individual enemy spawns
Tower upgrade costs now keeps scaling up at level 5 and above.
The "Earned Mastery" upgrade (reduce upgrade cost for each enemy the tower defeats) now reduces the cost by 0.25% per level (down from 0.5%)
All endless leaderboards have been reset