As regards being 'saved' or 'surviving' Armageddon,
ask them,
''Do I need to be a Jehovah's Witness in order to be either 'saved' or 'survive' Armageddon?
If they answer truthfully then the answer is
''Yes, you do have to be a JW to be saved/survive '', which means only JW's will make it. The rest die.
If they answer with a lie then it's
''No, you don't have to be Jehovah's Witness to be saved/survive. We leave that to Jehovah to decide.''
My answer would then be,
''In which case what difference does it make whether I join you or not?''