The new testament has mostly been taught from a religious filtering system. The words Advocate, Mediator, and Intercessor are all governmental and judicial terms. Intercessors and intercession has little to do with "praying for" someone, rather, it is pleading the case and cause of another to Christ our Judge.

The intercessor is taking the place as someone else's lawyer. You are maintaining their right and pleading their cause. If you take the intercessor role judicially and not  religiously you will win the case for your client, and in so doing, you will defeat the devil who is their adversary.