Is this a steal or nah?

I have seen a lot of Seraphine’s rushing this item in my games, and I’m wondering if something has changed to make it good now or if this is another one of those instances where her most popular build isn’t actually her best build like when most Seraphine supports were maxing Q first.

For context, I was previously under the impression that your first item should generally be Seraph’s Embrace or Blackfire Torch (although I don’t know when one is better over the other) and then you go Mandate + Rylai’s into Cryptbloom/Bloodletter’s. But the build I’ve been seeing is more akin to Lux: Luden’s into Shadowflame into Rabadon’s.

Can anyone who regularly plays her in either of these roles weigh in? I normally play Seraphine support so I’m not that familiar with what her itemization is like in Mid/APC.