Union Dues is a Very easy mission, just gather from 2 to 4 people and go for it.
The Image below represents the mission with all the tasks dones and the usual reward for it.(Highly recommend for farming XP for any level, so its good for beginners or veterans)


From the Ashes to Fire can be a Hard mission, you gonna need an anti rad build or lots of rad-x+radaway. It can be a tiresome mission for beginners. It takes more time to complete than Union Dues usually does, but its very good to farm the Trog achiev below.
(The Image below represents the mission with all the tasks dones and the usual reward for it.)



It's the grind Achiev of the Pitt. And you're gonna need the "Auto-axe" which was given in the Scoreboard(Atomic shop), image below. The best mission for doin' this is "From the Ashes", but "Union Dues" spawns some Trogs too.(Join other players expeditions to speed up the process).


Trogs image(same as the guide):




You need to complete 10 MISC quests for the npcs inside the "The Whitespring Refuge"(Which you can fast travel without spending caps), but what's tricky about it...once by day you get a misc quest ..so you're gonna need around 10 days to unlock this one, you just need to run around the place and it's auto given to the player.