What is the strongest continuation for Black?

Casual Game, https://itsyourturn.com
Miles C vs. John Coffey

1 2 3 4 5 6 7 8 h g f e d c b a 0

(black to move) 1. e4 e6 2. e5 d6 3. exd6 Bxd6 4. Nf3 e5 5. Nc3 Nf6 6. d3 O-O 7. Bg5 Re8 8. Nd5 Nbd7 9. Be2 h6 10. Bxf6 Nxf6 11. Nxf6+ Qxf6 12. O-O Bf5 13. c3 Rad8 14. Ne1 e4 15. d4 c5 16. Nc2 Qg5 17. Ne3 cxd4 18. Nxf5 Qxf5 19. cxd4 Bc5 20. Qb3 Bxd4 21. Qxb7 Bc5 22. Qb5 Re5

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Pawn promotion:
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