Guild Wars 2

Just as a suggestion since it seems that no one ever uses spirits because of their poor survivability why not just make it a aura that the ranger puts out on activation. The aura could have a specific glow or maybe some cool spirit armor that appears on the ranger for the duration of the buff in the color of the spirit or even little spirits taht swirl around the ranger while active

That way it is still the same concept but more idealistic. The grandmaster trait could then be something that maybe extends that buff a few seconds extra or increases the dmg or attributes that buff provides.

Making the buffs go on you instead following (with the trait) is kind of over powered..

Think about the warrior banners (which finally just got buffed). They are plopped down, and stay there, unless someone runs to it, grab its, gets a useless skill bar (except skill 3 and sometimes 2), until they set it down to repeat the process.
That annoying task of moving the banners is their downfall (aka their balance).

Your ranger pets give some very nice buffs. (burning on critical?!)
You can even trait to make them follow you, unlike warrior banners.
(I clarify, I’m using the banners as a comparison as they do the same task essentially).
The fact they can die is their downfall (aka their balance).

Making these spirits attached to you makes you practically a god. Why would you run anything else? You’re a moving Ranger Banner at that point.

I can see instead of making the spirits follow you, perhaps they recharge faster, and when they spawn have X Time amount of Invincibility (if not are permanently).