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Total event rewards is 3600 points needed.
260 points a day from dailes comes out to 3640 points
You have a 40 point leeway which means you can't miss a day if you want to max out the rewards. The last relevant rewards are at 3000 which means you need to do 12 days of the event if you don't care about the currency rewards at the end.
Tomorrow we will get the soul shards to promote Mumei, Chloe, and Marine, but miss Kronii by 20 points. We have to wait two days to promote her to 4*.