Uhhh so doing this in 2025 & the only issue is doing the mission on "Legend Difficulty" as there is none since they updated it & never changed the catalyst missions to reflect that. It still counts for the current catalyst step you're on for the blights but you can't complete the missions on "Legend Difficulty" bc there are only Standard & Expert versions in the Legends tab. I noticed this bc I never got mine done at time (had 2 more catalyst missions left). Was busy a few months back & decided to now do it & yeah you can't.