if you are still stuck on the quest for the hawkmoon I have you covered here is the solution for part 8 where it asks you to defeat champions or guardians a many found different routes for defeating champions and here is my method. is by doing the new mode that dropped with the season of the chosen called Battlegrounds where you prove loyalty to the empress one of the modifiers are champion in which they spawn champions that every time you defeat one it add progress to that part of the quest baring in mind it is pretty grindy to say you are going in with other two. guardians whoever slays the champions it should roughly credit you the progress thusly no need to run gambit or crucible after that you should be on the final part to obtain the hawkmoon