one thing I didn't mention: knockback
if you choose to socket your weapon with a nef instead of shael, it can have interesting perks:
poison dagger will never put your opponent into FHR, only the occasional FBR against applicable skills.
knockback, on the other hand, *always* triggers FHR when it occurs, and has a somewhat decent chance.
since people get horribly slowed down, if you kb them out of range, it can interrupt some animations. An extremely high damage opponent who attacks at snails pace can still sometimes win just by waiting the full 5 seconds per attack, since he would break your bone armor and then some. With kb, you can sometimes interrupt this and prevent yourself from taking further damage, which is, as our kazakh friend says, very nice