it's neat that you listen to feedback and I'm happy to hear that you're willing to work on balancing of these objectives!

However, I think balancing TTT themed objectives is going to be really hard considering their nature. Some objectives which are on the easy/medium level of difficulty with low-mid player count become a pain to complete with high player count (for example 35+) and vice versa, some objectives easy to complete with many players become hard when there's a low amount of players on. Building a consistency based system like the daily streak with inconsistent objectives just doesn't work, at least with this implementation. Instead of naming the objectives that need fine-tuning I'll explain even further why the system should just be changed a bit.

The way the objectives difficulty varies depending on how many players are on actually works in your favor. The goal of having daily objectives is to keep a consistent player base by having something that the player can achieve every day. So, having objectives that are easy to do with only a few people around encourages players to join the server with less players, objectives that are easy to do with lots of players motivate players to join when the server is very populated.

In theory, this encourages players to join multiple times throughout the day at different times and on top of that, it helps repopulating the server when there aren't many players and keeping the high player count.

If you still aren't convinced to change the streak system I could suggest some number changes to fit the average player count on ZARP TTT minecraft.