? Does the huge Nerf from the Beta format make this event impossible to finish even if you have a fed Ashen (I don't) asking for fellows, and even with the now expensive and boring repetitive Stash Outpost
Not impossible. Nothing's impossible when you never know how many bonus scrolls someone might win. If you do everything right, i.e. pick all the right beacons and collect all the extra currency around your city, then on average people will get 270 staffs. It takes 260 staffs to complete the set.
Quite comfortable, you may think. However, it does mean maybe around 40% of people (guessed percentage) will fail, playing the game normally with no diamonds, outposts or Phoenixes. That's out of the people who do everything exactly right.
The outpost should add around 21 staffs to your total. The Phoenix will add another 6-7 staffs. Those people collecting all their currency, opening the right beacons and completing the quests who also have an outpost... will most likely complete it.