Anyone have a one button macro that will auto mark targets sequentially.

Example:
Select mob - hit x key - mark one
select 2nd mob - hit x key - mark two
select 3rd mob - hit x key - mark three

Currently play using a D-Pad and marking using that thing is too slow. I end up 'bowing' to the mob half the time if I try to do it too fast. I'm sure the other party members just think I'm polite, but would be nice to have a quick option.