hello, i did a 4p build test for ganyu to see which one worked best for me! the (legitimate) options were the 4p wanderer's set and the 4p shimenawa set (phy dmg was just for fun LOL).
i have way better sub-stats on my wanderer's pieces, but the shimenawa set still outperformed it - guess i'll just have to keep farming to get better sub-stats on my artifacts...
to be fair tho, the shimenawa set can be a little annoying to use if you're used to having an almost 100% up-time on ganyu's burst. considering this fact, this is definitely not a support ganyu build, as you'll be getting her burst less often.
i don't use the blizzard set because the 4p set-effect only gives crit rate, which ganyu already has a lot of thanks to one of her passives. additionally, the only 5-star bow i have is the skyward harp (which has the main stat of cr). also, if u have another cryo character in the team, that's even more cr that you'll be gaining, so i opted for more dmg (cd%, atk%).
thank you for watching :D