Imperium

If it were back in the day when just clearing was enough, maybe, but in an era where scoring matters, isn't this pretty hard for a 25?

It should be at the very top of the 25 range. Its main characteristic is that it's a single-trick chart focused on leg strength consumption within the 25 level.

Both stamina and gauge maintenance are difficult. The bracket aim is quite challenging, but it's not beyond a 25 level; it'll likely be between mid to high depending on individual skill.

There are many runs mixed with brackets, and since there are few potions, you have to hit them accurately. These elements drain your stamina significantly, and the bracket run spam that follows is even more tricky and longer than Indestructible, making it really tough.