Wow...I wish I could give you some feedback but I'm not one to mix my own feed mix, so I don't have much info on the correct feed percentages. I only play with the feed by cutting it with some whole grains to save me money during slack laying times.
Bruce can help you there and some of the other folks who actually study on these things. I don't normally complicate things by measuring and percentages....I just use layer ration from the local feed co-op mill that grinds it fresh and count on that to get the right nutrients in the mix. I just use it as a supplement to free range, so I'm not too particular. I'm sorry...that's an area in which I have no expertise whatsoever.