Fucking hell. Had a whole post typed up and hit back and lost it. Anyways tldr
I beat Sheratan after about 6 tries and used WoL, Tilith, Rikku, Orlandu, and Agrias. Had Ling and Firion in reserve. The other 3 I didn't use.
Sheratans adds persist even if you kill her first which almost wiped me.
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