Chances

I just got my act back and i got a 29 comp(25-33-28-29) however my last two acts i got a 31 on english so 30.25 superscored. Im a senior in sept should i retake it one last time? What is superscored used for? Admission and scholarships or just one? What are my chances to:
Ut knox
Unc
Ga tech
Fsu
Uni georgia
Uni alabama

I am asian male in tenn.

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