So with most of the abusable tricks patched, would it be possible to have another leaderboard category for random mode? Honestly it's two very different game types. All pick it's coming up with the best strategy, which is great, but once the best strategy becomes known it's moreover whoever can pull it off the best, or get's luckiest with the chaos waves. Random is more about adapting, especially since it's harder to get a viable amount of support towers. Each wave you might be selling t2-t3 towers in order to adjust for the type.
Edit: Played an express game and cleared it, I have no idea how someone got 200 k on I, R, C, E. I tried looking up his game to see his build, and I can't find it in his recent game history either.