HEY! I hope you see this post, b/c I can't find you. I'd love to help you with your decreases, but am unable to email you b/c no email address was left with the comment you left on my blog.
Just in case you see this and just don't want to email me. :)
I decreased every 12 rounds (once per pattern repeat) 3 times. Then every 6 rows 3 times.
Then every 4 rows until I was down to the regular number. Unless you've got thick ankles or a bigger than average foot, I would go with the pattern from ankle down.
hope that helps!