PVP Frost Preference 2-3 talent points

As Frost Mage PVP, we have those 2-3 talent points to play around with. I've been trying out different things, but wondered what you like to do with those points.

I know people in the past have said "No" to shattered barrier, but some top mages play with points in it, and I kind of miss it; specifically in WG and TP when I am following the fc who is being chased. I know it's not reliable, but I still kind of miss it.

I had shattered barrier but changed. Now, I have blazing speed and piercing chill.

So here goes: what is your preference and why?

Enduring Winter?
Blazing Speed?
Piercing Chill?
Shattered Barrier?
Other ...