Now let's assume:
(1) We have an infinite number of 1 gems. If you play this game for a year, this number will definitely become infinite.
I use the following table to explain the probability and cost of gem synthesis:
So from the above conclusion, five combinations are the best!
Don't believe your luck if you synthesize gems more times, because the more times you synthesize gems, the closer you get to my conclusion. Of course, four combinations can solve the urgent need, but it has an extra cost:
(1) It costs 63Y75T for each synthesis, and it is estimated that the next measurement F will be synthesized by gems. The number of synthesis with four is definitely more than that with five, and the synthesis cost will be more.
(2) Feeling depressed after the synthetic failure!