There might be a bit of a misunderstanding.

If he's taking in over 50% fat and under 5% carbohydrates from his BMR, he'll be in a ketogenic state within roughly 2-3 days (the first time). Ketones are protein sparing, making a ketogenic state anti-catabolic. In addition, the refeeds that will be done every 10 days or so, ; thus, he will replenish glycogen stores, creating an anabolic effect. At his weight, a ketogenic style diet is best. He just needs to keep his fat intake up and carb intake down.
One of my articles on the topic:
The Evolutionary Diet - Evolutionary.org