Okay, strap in, this is going to get complicated and weird.

There are two gamestates, and they exist in parallel:
The first one is for autosaves
The second one is for deaths.
Under normal circumstances, you're in game state 1. However, when you die, you start in game state 2.
Game state 2 starts with 0 every time you enter it (except you can kinda trick it, bit more on this later)
Game state 1 has every point you scored, that was saved via an autosave. If you score a point while in state 1, the point is in limbo until there's an autosave.

To get the challenges, you need to get each challenge to 100% in the same game state, without ever changing into the other. Which means, if you die, you start from the beginning.
Luckily, if you die again, you stay in state 2

The only way to get back to state 1 is to reload to a checkpoint, or finish the arena.

You need to earn points for the challenge and die, without killing the final enemy thus not ending the arena, and repeat until the challenge is over.

I think that if you get a few points in state 2, and accidentally end the arena, your points might be added to the ones you already have in state 1, but i havent tested this and i cant say for sure! My suggestion is try to grind a single challenge in one location

The way to trick your progress out of state 1 and into state 2 is to be in state 1, earn a point and and die. This *should* keep that one specific challenge's progress in state 2. You may be able to do this with 2-3 challenges at once, as long as you get a point in each before you die.


Oh, and if it wont let you claim the rewards for a challenge you just completed, thats fine, die or reload to a checkpoint, that *should* stick around.

I was pissed off while i was grinding this crap for hours on end, so i figured out that you can farm your finisher meter up and restart the arena while keeping your finisher meter progress.

I was looking around on how to break the game out of sheer petty, and your finisher meter progress is tied to the autosaves, and not the game states. Which means, if you enter an arena, you can grind it out from enemies, and when you're down to the last enemy, go into settings, change the difficulty from one to another (maybe avoid hardcore), the game will autosave, including your current finisher meter amount. Reload save (or maybe death works too but i havent tested that), you now start with as much in the meter, as you did when you adjusted the difficulty. You can switch the difficulty back now, if you wish.

You can do this repeatedly and 'farm up' your finisher meter to the max, then reload from checkpoint, and now you have a full charge on any attempt

However, if there's an autosave when your meter has changed, then that amount is going to be the one you start with now. Every autosave your meter charge is overriden, so make sure you dont go below max or 2 charges when there's an autosave!