Unflinching Feels Bad

Does anybody go unflinching? it feels like such a terrible rune to pick. I say this because there are no base stats. The one thing I do like about it is that there is slow resist added and there aren't many places you can get that from. However, I think this rune needs a buff. Either make the tenacity and slow resist additive and not multiplicative or add a base stat to it.

It just feels like a shit rune. Are there statistics somewhere, where we can see who picks it?