I was thinking along the lines of the exp/gold or the resource for the particular action it activated on. I honestly thought you'd nix the idea, so no problem removing the quad aspect. If possible, mith-triple would overrule any active double(for that tick). While any active triple would overrule the mithrilskill. Honestly, I went with 10 levels because the math was easier. Instead of increments of.5% and .25%, respectively, we could go with increments of .1% and .01%. Lower the mith cost to 15xlevel. Not sure where they'd start off with the lower increments though. But I wanted to keep the chance of activation low, which is why I chose a cap of 5% and 2.5% chance.