Yeah so around 770k is the minimum, when I try to finish in top 1k I try to aim for at least 790k or 800k. That’s safe.
You should be at least around place 7-800 on Sunday evening, that you stay in the top 1k till Monday morning
https://forum.smallgiantgames.com/t/sept-2020-riddles-of-wonderland-challenge-event-guides-discussion-summoning-results/201961/156?u=ferg
From last riddles, 760k wasn’t enough, but you will find in the same thread some results with 770k that finished top 1k