When I was a JW, conducted lots of Bible studies, and as a Ministerial Servant with the duties of an Elder, a lot of people came to me for help. Even then, I knew that the WTS was structured too much like a cult and I didn't agree with their urging everybody to study study study NOT THE BIBLE, BUT THEIR LITERATURE. So in my studies with people, and even in field service, I most always took ONLY my Bible with me. When I talked to somebody, it was with the genuine purpose to help them see what the Bible says about things, and that it's the only book with answers to all of life's questions.
I've always been well versed in scripture as I have been studying intensely since I was a teenager and I covertly got my degree in New Testament Greek while in good standing in the congregation. You would be surprised at how much more effective I was one-on-one and in field service when I made the Bible and IT'S message of salvation the focal point of my conversations. I always thought to myself, "If this is how Witnesses went door to door, we would be sooo much more productive."
I miss those deep theological conversations, though.