The White Ring... principal of the Three=? UT

[the phantom]

Galadriel herself probably is more powerful (for one reason, she is 100% Elf)

We've already discussed the 100% elf thing. It gives no advantage to Galadriel whatsoever (actually, the mixed blood of Elrond was likely an advantage to him).

And Gil-galad wasn't there when Vilya was forged by Celebrimbor, so it wasn't "originally" his. And how do we know if Gil-galad was as powerful as Elrond (we don't, so we also don't know if Vilya would've been greater on his hand).