What year outback. I have a 13 and currently run 750 in the rear and full center with IBS up front. I had driver and 175-300 pounds of people in the rear seat corner. I will try to post pics tonight.
Here are a couple pics not the best. I found going with the wake plate all the way up caused the wake to become washy. Sorry I can't help with your 06 exactly but it might help you get started.
I have a 2010 outback v I run 800 rear locker 800 on seat 400 front locker and 550 up front in walkway. Plus I had an extra 600 lbs with people weight today. I run 10.5 to 11 mph wake plate all the way up. This is for regular foot surfing.