In that Foretelling, she referred to "...the lion sword, the dedicated spear, she who sees beyond..." Most agree that this is a reference to Rand's girlfriends, but why are Elayne & Aviendha cast as weapons? That is a very peculiar metaphor to describe them, especially considering Elayne has never been, nor shows any sign of becoming, a warrior or anything remotely weaponish, and Aviendha has moved beyond that. There is little to indicate she is even a particularly notable warrior, in her nation full of elite warriors. Even more odd is calling Elayne a weapon, next to Aviendha. At best she would be "the lion spoon" to Aviendha's dedicated spear.

I can't help but think this means Rand might actually use them as weapons in some way. Say, perhaps, in a link with Callandor, where they have to be the ones to actually weave the weaponized flows...

I am not actually convinced of the accurracy of this idea, or of Rand using Callandor with those two (given Elayne's pregnancy and accompanying difficulties channeling), but it the one stands, I believe the other supports it.