Quote Originally Posted by kllrwlf
The best I came up with for different targets was this:

/castsequence [target=mouseover,exist] reset=15 blessing of kings, blessing of salvation, blessing of salvation, blessing of salvation, blessing of salvation

This is so that I can cast Kings on my tank, and Salvation for the other 4 toons. I just move my mouse to the toons in order.

Of course, this would only work for your main that you are controlling with the mouse to do all the mouseovers.
Just DL the mod Pally Power from Curse. It lets you set a blessing for each class or you can assign an individual toon a certian blessing and it keeps it track of them all you can just right click the box and redo all the blessings without having to target the toon or anything.