The easiest way I found to recruit her was by leaving the wilderness and headed through the Under Dark to Moonrise found her in the audience chamber.
I don't fancy murdering Tieflings myself so let the rite of thorns seal the grove.
As she is bugged on Xbox X for the time being I'm not sure if there is any issue with her Act 3 companionship yet as I have to take control of her in Act 2 as she won't follow.
She didn't try killing me like she does with Act 1 recruiters and slid fairly well into camp life.I enjoy her musings
I feel like you are missing the entire point of this thread.
There is a complete lack of in-world justification possibleor knocking Minthara out, there is no way to know she is recruitable.
So I m just suggesting an alternative, where she is capable of escaping, so we dont need to knock her out at all.
