Animal barbarian wrestler weapon property runes

[The Total Package]

I've got a fairly high level animal (deer) Instinct wrestler barbarian, I was contemplating Fearsome and Grievous. Some people have said to just go for damage, but our other party members do have that covered. They are unable to inflict these conditions, is it worth grabbing these two runes or should I go the traditional way and just snatch runes like Frost, Astral, Corrosive etc?

[Blave]

How often do you crit and how often is your target still standing after a crit? High damage classes like the Barbarian can often kill or even overkill targets with a crit (assuming the target will often already have taken damage), which causes debuffs on crits to go to waste. I personally think these runes are better on classes that attack very frequently (monk, flurry ranger) or crit more frequently (fighter, gunslinger) but with generally lower damage than what a barbarian can do.