Since they're scripts, r-x--x--- may as well be r-x------.
If you can't read a script, you can't run it, no matter the execute bit.
If you're paranoid about users reading them, I'd go with r-xr-x---. Otherwise, going with the default r-xr-xr-- is plenty secure, and there may be other processes that expect it.
Rod Knowlton
IBM Certified Advanced Technical Expert pSeries and AIX 5L
CompTIA Linux+
CompTIA Security+