The commas are purely a function of your spam speed.
The spell names are only important with regards to the length of the entire macro.

A Nill/Null effect with a reset is an option.
As is enough commas to allow for continual spam.

If you're willing to build a click macro, that will get around the space issues.
But click is not functionally any different from one super huge macro, with every castsequence in it.