Multiple Artifact searches
My first explorer had been doing Artifact searches with great results. I would find wonderful buffs and several bags of rainbows a week. During the World Cup event, my 2nd explorer got skills to do Artifact searches also. I thought it'd great, two fast explorers doing Artifact searches; I was going to in the "buff money." However, that was not the case. As soon as I started sending both Explorers to do Artifact searches my results were horrible. Sandwiches and fish platters was all I found. After a month of this, I decided to go back to sending only one explorer and I'm back to getting great results again. Anyone else seen this pattern?