FGO NA: Battle in New York 2021 - The Green Comet (Budget Arjuna Alter Set-Up) HD

Replace Caesar with whatever buffer you have that surpasses him in terms of buff strength. Chiron, Merlin, Waver, Nightingale, anyone who can help him get more damage will do the trick. This is a really weird quest with a very odd gimmick, but it’s far from the hardest one. Just pray you don’t get messed up by bad RNG on the Buster Resistance debuff or Achilles spamming his Charge Gain skill and you’ll be fine.