@EventineElessedil
I rounded a bit which could change something. But what I am talking about is strictly buying refreshes vs. strictly buying from shipments. The free energy shouldn't be a factor because you don't have to buy it, and if you combine farming and shipments it will be more efficient. Even if the refreshes might be a bit cheaper, they are subject to terrible RNG which might cost in a bunch more. Buying from shipments is safer, as it results in a reasonable drop rate that is guaranteed.