after you read the macros page, you need to decide a path to follow at first till you get your own style. I have seen some macros used to automate cast cycles and other macros used to automate "iwin" etc buttons. with a mostly shammy team, you should be able to micro the shammies spell rotation just have the same spell cast broadcasted to all shammy toons. If there is one thing I hate about tank sequence macros is that some blow cd's that aren't necessarily needed to be blown. Minor details indead, but you don't want your taunt on cd cause it looked good in the cast sequence or click cast rotation...

cheers and gl