For maximum memes, this build requires Xata's Wisper from Xaku to be infused onto Saryn. Utilise both their weapon buff abilities to increase this weapons multishot by 4 times (this does not equate to 4x damage but it's still a heck ton of damage).

For high level steel path, survivability becomes an issue for Saryn. Substitute Xata's Wisper in favor of some kind of survivability ability. I recommend an invisibility ability of some kind which I would then suggest switching out Serration for Spectral Serration for that sweet, sweet damage.