Hi cryto...thankyou for the reply;.being that jws are motivated by their love of jehovah, the ransom sacrifice of jesus christ and guidance of his earthly brothers the faithful and discreet slave (the Governing body ) imo you are you will be lacking the ammunition to preach to them as you seem to only be relying on your own strenghs.
Are you sure there is no supernatural backing for your cause?
Best wishes.