How to estimate cost of FOST shards?

Primordial5lime

I have 52/100 shards for my 6* FOST. Other 4 FO toons are 7*. Does anyone know how to estimate the cost in crystals for refreshes to get 48 more shards during FO double drops?

TekkarEdorf

You still got a few days after that, and the event lasts a week

CamaroAMF

I'd think you'd get all you need or at least real close by refreshing each node once per day, so 150 crystals per day there. Plus two energy refreshes for the energy to sim them so 100 crystals each day. Total of 750 crystals over the three days.

Primordial5lime

Only had to refresh all 3 nodes on 2 days and one node on the 3rd day. I could have waited to the 4th day and skipped the 3rd day refresh, but I was impatient.