Unorthodox mythic+ crafted gear picks for Ele

So I have been debating in my head A LOT about what I should use my spark on, and there are not a lot of sources or discussion on this in general, and even less for mythic+…

This season, I intend to basically only do mythic+ and I was wondering if anyone has any insight on if Vambraces of Deepening Darkness could be better than going for the generic embellishments on neck or weapon?

I could also have this effect doubled with this embellishment,

I know what the general wisdom is, but has anyone actually looked into it? And how far behind it is in comparison to the other embellishments in mythic+? I just find the rest of the effects so boring, and want to know the reasoning this is piece is being overlooked.

I tried to SIM it, but I am not very good at it, and it’s hard to tell if it’s being accurate to multi targets or not.

I was also looking at the shield. It’s a little unorthodox, because you would think this is a tank embellishment, but since versatility is pretty good with Ele and we do get damaged in mythic+ a lot regardless of being a tank or not, would this vers buff have decent uptime anyway? And could it be better than the other embellishments?