I wanted my heals and spells timed, so in the past I used dummy commands, !Attack, !Auto Shot, etc. But it got old and filled up my macros. But if you just leave a blank spot where the command would go, the macro does nothing, hense a dummy command.
The ,'s in the commands at the end above are so you can mash the macro and it won't reset until you tell it to (combat/time). The ,'s at the start are so you can map a key to all alts (CTRL-F1 just an example) and all them try to do one macro. For some of them, they do stuff, for others, they get skipped so you don't over do stuff (4 earthshocks are a waste). Same with the heals. 4 people healing is WAY to much, and you get no DPS out of it. So I have 2 heal and rest DPS on a rotation. Hope that helps explain the idea.