Killing the Reaper
In the beginning try to earn as much gold as possible and max out all your stats in the powerup screen.
Then kit out your favorite character as much as possible. My favorite is ALLURE. Once he’s decked out, and stats are almost maxxed, when you fight reaper just constantly HEAD DOWNWARDS and kite his blades. Keep moving!
You want to pick up fancy feet to have higher speed.
I have been able to kill Reaper all the way to corruption level 9 now! I haven’t beaten 9 yet, but I will try it again soon to beat it.