This one is a little old, but I haven't been around a lot lately. I've got a 11k gal in ground pool using salt water and a Pentair variable programmable pump as well. During the summer, I run my pump at 1650rpm from 6am-8am, 2450rpm from 12pm-2pm and 1650rpm from 5pm-7pm. I'm sure you could shuffle the times a bit.
I picked these speeds based on the flow and volume of my pool. I've determined that this gives me at least 2 full turnovers of water per day. My chlorinator requires at least 1550rpm to sense enough flow to engage the salt cell, which is why I picked 1650rpm for my slow speed. If I remember correctly, at 1650rpm, the pump pulls ~450w. At 2450rpm it's pulling 1100w or so. At 3200rpm (my max setting), it will pull about 2100w. I have a manual setting of 2800rpm which I use for vacuuming and it pulls about 1800w.