Primal Rage. Where and is it any good?

Hey all, I was just wondering if someone could help me out and tell me (specifically) where I could cap Primal Rage being Kurzik and if its worth getting? TY in advance.

For 10 seconds, all of your attacks have an additional 10...46% chance of being critical hits and have 20% armor penetration. Primal Rage disables all skills for 10 seconds.

Gyala Hatchery (explorable), look for warrior boss soemwhere in there.

I think it is a decent skill for killing caster in PvE, that's about it. Best to use hammer with it, to get most out of it per hit. With IWAY of course.

It does not provide IAS and WASD pretty much counters it. I'd say it's pretty bad.

plus all skills are disabled for the duration of the stance, meaning you lose all adrenaline and only have 5 seconds to charge it up if you plan on spamming Primal Rage