What to build on Kai‘Sa (and when)?

I just swapped to Kai‘Sa as my main ADC this season and after scrolling through the KaisaMains Reddit I‘m even more confused than before.

Some people are convinced that double dirk + Pickaxe into Collector and Youumus etc. is the actual way to build Kai‘Sa.

Others say that (Kraken —>) Statikk —> Nashors —> Guinsoos is the right play. While a bunch of people argue that this build only seems to work on midlane cause a High-elo smurf spams it in Plat but it‘s actually bad on bot lane.

Moreover I read people typing about the good old Crit build cause Stormrazor into Rageblade is a „Noob trap“ —> both items apparently don‘t synergize with themselves and with KaiSa‘s kit. (I don‘t know why but I was never into this kind of details in league).

Besides all this if you watch on Lolalytics KaiSa‘s best build with highest winrate in Diamond and above seems to be Stormrazor —> rageblade.

So could u guys tell me what to finally buid on her and if I got multiple options what‘s your thought process on it?