JW's hope is in paradise earth. It used to be the 144000 that you see in Revelation but more and more they believe those people are getting very few anymore. I think the average JW would tell you they are looking for paradise earth. This is what the last JW couple told me.
Last year I went to their Memorial. It is their communion service only most of them don't take it. They pass the wine and cracker without partaking of it. I was the only one in my row who partook of both of them. They had a sermon leading up to this and part of it dealt with paradise earth and used Isaiah 11 to talk about Paradise earth. You can read that in your bible but also go to JW dot org and see their version as well.
The thing to do with a JW is to show them how their organization has their teaching messed up. Get them to doubt BUT you have to be the one asking questions as if you are their disciple. Do not fight with them. You ask the questions and making them answer you.
One way is to have them look at Isaiah 44:6 and reconcile that with John 1:1. Can you tell me the difference between the big G and the little g? The little g has to be a false one but get them to explain it to you and then drive them to the fact that there can be no gods other than God.
Another fun one that can happen is the resurrection. They believe Jesus resurrected but only in spirit. This is really reincarnation. Ask them about how Jesus resurrected. Was it bodily? THey will say it was in spirit and He took up another body. Ask them to define what a resurrection is and then reincarnation. Then ask them why is it that Jesus raised Lazarus from the dead in the same body as well as several other people and even proclaimed that He was the resurrection and the life but yet He could not be raised up in His same body?
They believe He is Michael the archangel in spirit so he was raised as Michael but then became Jesus again when he assume another body. Ask a witness to reconcile that from the scriptures. They cannot.
One other one that I used.
Rev 1:17-18. Ask them to read both of these and ask who is the First and the Last referring to? They will usually say Jehovah. Ask them to read on and then ask when did Jehovah die? They will say He didn't yet the passage, and their confession, show He did but they may be agree with that. Instead they will take you to Rev 3:14 to say Jesus is created.........but first they must answer 'First and the Last'..........if He is Jehovah then when did Jehovah die.
You want to sow seeds of doubt in them. Get them to doubt and question things.