For gamers looking to diminish spending while maximizing overall performance, are attempting due to Ningguang, Xingqiu, and Bennett

https://www.scribd.com/document/882848980/Maximizing-Your-Genshin-Experience-A-Comprehensive-Guide-to-Using-Genesis-Crystals-for-Character-Doubles-164183

For gamers seeking to decrease spending whereas maximizing efficiency, try out by way of Ningguang, Xingqiu, and Bennett