Just use power break with Auron
Pull back
cast haste on everyone
Use dark attack with wakka
switch auron with lulu
make wakka cast dark attack again if evare
keep makng lulu cast blk magic
make tidus use cheer if evare usse photon somthing
if tidus has overdrive and evare has about 6-8k life use the first one
then get rikku to heal if need.