Niya's tool's: Poison

Ask Mr. Robot
1

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BiB recommended Niya’s Tools: Poison here, but I find Burrs do better damage.
It’s not for an additional potency slot as you can see at tier 2.

And also simulation for Niya’s Tools: Poison looks not even implemented.
https://www.askmrrobot.com/wow/theory/mechanic/spell/soulbindniyastoolspoison?spec=DruidGuardian&version=live

Can I trust this result?

2

Now I guess it only considered defensive aspect here?

3

We don’t have a value on niya’s tool’s: poison – it’s highly variable whether it would do anything for you or not on a fight. If it is picked, it is because of the potency conduit.