OKLAHOMA CITY — Oklahoma survived a pitcher’s duel on Thursday, but it may have to stage a fireworks show to move to 2-0 at the Women’s College World Series. The top-ranked Sooners dispatched of 9-seeded Stanford 2-0, only to face a much more potent offensive test. Fourth-seeded Tennessee will meet OU on Saturday with a spot in the WCWS semifinals on the line. The Sooners (57-1) and the Volunteers (50-8) rank in the top 10 in ERA and home runs per game and they fall in the top two in runs per game. Tennesse slugger Kiki Milloy has belted 25…