Buff effect limitations on loyalty tattoos beat the purpose

I want to use the loyalty tattoo of ahuana in my build, as it seems to be a decent buff for suppression capped builds.

The buff granted by the tattoo prevents an additional 10% of suppressed spell damage, and the buff effect is further increased by 20% per allocated ramako tattoo (no idea if there's an upper limit).

Now, 10% additional prevention isn't very impressive on its own due to the high cooldown of these skills, and the tattoo shines once you have some ramako tattoos in your build. But I only have tasalio (stun avoidance) and tawhoa (flask duration) tattoos, and all the ramako tattoos are completely useless for my build, even though I'm playing a pathfinder.

Does anyone feel the same way? Or does anyone even use these loyalty tattoos?

There's no cap on the increased effect.

The main drawback is that these tattoos have a huge cooldown, so it's really more of a once per map kind of deal. I don't think they're very popular for this reason.