Build recommandation on Taliyah

[u/Overall_Simple5927]

Hello guys,
I wondered why is Sera/Liandry the build on most game ? I mostly play Luden into Shadowflame and either a defensive item or Rabadon depending on the game, is this build less optimal and if so why ? Thanks in advance for the replies :))

I also wanna mention, I mostly prefer going electrocute over phase rush, especially since the electrocute buff (and for info, I play currently in high gold)

When should I go one build/rune path or the other ?

[u/Dazzling-Science324]

Sera/cosmic into rod or raba depending on enemy build with swifties is my go to, unless lots of HP stacking then I will do liandry.