great guide as always.
can you just confirm something though for me, on the guide where you have this -
Step 3: Misson Replays
If you missed anything or need to complete challenges, collectibles, etc, then you can now do so on a lower difficulty.
what i want to know is on the grand master achievement you have put a note about the challenges not counting on easy, so what level should they be done on as the 2 mentioned above seem to contradict each other.