Pumpkins

The surprise quests drop Pumpkins as well but you can only complete each one once.

I'm not sure the release date, but there will eventually be a 5th free quest that will be the optimal farm spot for pumpkins.

The 50AP quest will be released in time and is the best place to farm for pumpkins, but the guide suggests to farm on the 40AP node instead due to you probably needing candles the most at the end. The Surprise Quests drop a total of 132 pumpkins which is more than enough.

"You will be awarded two Pumpkin Lantern Pumpkin Lantern for each Surprise Quest completed (with the exception of the last Surprise Quest, which awards a Crystallized Lore Crystallized Lore), for a total of 132 possible Pumpkin Lanterns."

"Either Final Curtain or Second Stage are generally the best areas to farm. Encore Live technically has the highest Pumpkin Lantern drop rate, but throughout completing Quests in the Event, Sweet Candles are likely the item you will have to farm the most for, which Encore Live does not drop."