Topics like race and polygamy have been "adequately" explained away, so I don't think we'd get anywhere discussing those things.
Can anyone suggest specific talking points from content on LDS. If you go yourself, you'll see - those people are good people.
They may need much more than casual contact with the church to see the truth in it.
By the time you are done, you'll have all of the basics down and will have the framework to know what to ask next without any confusion.