Judah - Ephraim (mix)  (iron & defense) is a tribal profile option that helps the virtual distinction difference in the new day of the Christianity practice.  Say the temple in literal Jerusalem is not 'Jerusalem' of today's group of believers, but it's about people part of the belief, even possible to rebuild virtually online as a reminder to represent the worldwide practice.  Judah and Ephraim are two different territories but each were spoken at differently at times of being good or bad or in God's wrath or love due to them either following the statutes and commandments or not.  Sea and waters of people represent the multitudes of people in the population, and Iron is a group within the multitudes that practice standard worldly knowing's of which most read the bible less frequent and attend church less, even slightly in unbelief or unenthused.