Ok so I just finished tier IV for this challenge and it doesn’t seem to be going further. I’m very disappointed because it seemed like a good/fun way to get to level 50. I believe you need 50000 points for lvl 50 and you will only have 17500 available from daily’s, the points for all other challenges are far worse and require waiting more than anything.
I just replied to your original message and @zephyr1 split it over to where the information is.
Tier IV is the final Defeat Heros challenge. See discussion here: