I've got the Pally/4xShammy setup, and I wish I started out with BS/JC on the tank and spreading the other skills to the shammies: mine/skin, herb/alch, insc/lw, ench/tail. The extra stats given by the BS/JC combo are better than having mining/nodes on your main. (Which is why I'm currently a BS/Engineer on my pally tank.. but I've come to realize Engineering just doesn't have the benefit of JC in WotLK.)