Talk:Expedition/@comment-25682482-20141114072748

I think expeditions that require Drum canister have a base chance for getting great success, and this chance does not sum with sparking ship. I was testing exp 21 for like 20 times with 5 sparking ships, and sometimes it's can't archive great success. I guess that it take either 50% of drum or (16.5% X sparking ships),and choose which one is greater.