Richard Sibbes has a fairly unique position on final justification, as he is willing to discuss the various ways one is justified. He is justified individually by Christ’s sacrifice. Christ justifies the entire Church. The Spirit justifies Christ. We justify Christ. We justify ourselves. Sibbes discusses all of these realities. I will only quote a small portion of this.
For our further instruction and comfort, let us consider, that in regard of God likewise, we shall be ‘justified’ from our sins in our consciences here and at the day of judgment, before angels and devils and men. As Christ was ‘justified’ from our sins himself, and he will justify every one of us by his Spirit, his Spirit shall witness to our souls that we are justified; and likewise his Spirit shall declare it at the day of judgment; it shall be openly declared that we are so indeed. There is a double degree of justification: one in our conscience now, another at the day of judgment. Then it shall appear that we have believed in Christ, and are cleansed from our sins. When we shall stand on the right hand of Christ, as all that cleave to Christ by faith [will do], then it shall appear that by him we are ‘justified’ from all our sins whatsoever.
~ The Fountain Opened in The Complete Works of Richard Sibbes vol. 5 pg. 492-493
Sibbes goes on to say that we will justify Christ on the last day. We do this in four ways. We justify that he is God by relying on him as our rock of salvation. We justify him as prophet by our enlightened understandings. We justify him as priest by relying on him alone for mediation and intercession. We justify him as king by holy living and the practice of lovely religion.