More than an omen, an identical lineage might be engineered to similar effects — in which case we are uncomfortably close to the magical thinking of eugenics.

I would guess that it wouldn’t work, though - the laws of magic would probably insist on it being genuine happenstance.

I unfortunately don’t think we’ll see the Rani applying the actual scientific method to what she’s doing - her experimentation seems to be done, and she’s moved on to application.

I think she’s retained her sense of purpose, though, which sets her apart from the more chaotic Master.