Hi Faithful Witness, You first need to get to know your bible conductor (at least two meetings) as a person (what does he/she fear, what makes them happy, etc.), read Steve Hassan's book(s), and establish some common ground rules for the Bible Study (even if it is in your mind only). Also, you might want to learn how to use http://www.biblegateway.com to help you quickly locate versus in the Bible.
When my former friend setup a bible study with a brother for me, I only agreed to as long as the brother did not bring any WTBTS propaganda with him and used only the Bible. The brother would skip around the bible and cherry pick versus to attempt to prove the WTBTS's doctrines that people need to be guided by an organization. The bible study only lasted two meetings, because I started to feel that the brother was trying to indoctrinate me and I was not prepared for when the brother tried to change topics when I was refuting the WTBTS's blood doctrine. Like I have said before I wish I had read Steve Hassan's books before doing the bible study.
In hind-sight I feel that I should have let the JW feel that he was in charge and only ask simple, open-ended questions about what the JW said. I should have let him use the Bible Teach book and be prepared to ask simple questions that contradict what is written in the Bible Teach Book. The rules that I should have established early on are that I prefer to read the NT because I want to follow Jesus Christ's example, read an entire chapter to understand the context of a verse in a chapter to slow down the WTBTS's tactics of cherry picking verses and changing topics when a JW gets stumped, discourage a JW from changing topics when they get stumped, and have some sizzling comebacks for standard WTBTS's platitudes that JWs are taught.
To counter "Jehovah needs an organization on earth", ask your conductor "Were the Pharisees and Sadducess the leaders of the Jewish religion and represented Jehovah on earth? Why did Jehovah send Jesus Christ to earth when he had an orgnization on earth that represented him? What did Jesus Christ (and Jehovah) think about the leaders of the Jews (see Mt 23-24)? Where in the Bible did Jesus Christ say that Jehovah need an organization on earth? Why was the Holy Spirit sent after Jesus Christ's death (use Biblegateway to quickly find the scriptures)?
To counter the unparrellel love in the WTBTS organization, ask your conductor "What is the greatist commandment and the second one (search Mathew with Biblegateway)? How can you justify shunning JWs/exJWs who no longer believe that the WTBTS is Jehovah's organization on earth with the two greatist commandments?
Best wishes with your reverse witnessing.
Peace be with you and everyone, who you love,
Robert