not sure on the length of one line.. but i know you are limited to 255 or so for the complete macro....

you can add modifiers i was just trying to keep it simple.

and that macro you put is your follow macro.. make sure theres an assist macro.

and yes the /castsequence i used will work but it wont reset after combat... so if you want reset or timer modifiers you willl have to add them like you had in yours.