Board Thread:Special Events/@comment-25730832-20151117074608/@comment-24930367-20151123031928

Still, the best choice is to fully load the main fleet DDs with drums. More drums = more TP. Which means less run, less buckets spent, less...salt in case you don't get S-rank (and sometimes it just happens).

Leave it to your escort whether they (and support expedition) can score S-rank or not; main fleet is the drum and Daihatsu mule.