Jehovah's Witnesses view the 'ransom' as essential and also demonic.
The Watchtower, 15 November 2014, page 12:
The only way any of us can have peace with God is to have faith in Jesus’ ransom sacrifice and appreciate that blood has special meaning to our Creator.
The Watchtower, 1 April 2007, page 19:
Human sacrifice in any form is demonic, and true worshippers of God stay away from anything that is connected with such a practice.