Those repetition games never worked for me. I'd be perfectly fluent in troubling consonants during a practice session, and then stutter on the same consonants out in the real world. Reading a script is just practicing reading a script. In the real world it's all about stress of social interaction, finding the right phrase, dealing with background noise and getting the words out all at the same time. Reading phrases over and over again alone, I've found, never helped in that regard.