Yeah, it’s way to strong.
Compare it to a balanced skill like Banner of Discipline.
That one only gives a meager 8% increase in crit chance plus 15% crit damage to zerker resulting in an >20% increase in damage.
Wait a moment…
Hah! But you have to manually move the Banner around, while the Spirit is… inherently immobile without a trait…
Well, in the end it’s all about the uptime, and banner can only get a 100% uptime with an adept trait, whereas the Spirit can be up 66% of the time… with a 70% proc chance… when traited…
Ok, so the Banner is stronger, but at least it can’t die. Take that OP Spirit!