Thank you for responding to my comments.
I see where you are going with the paladin roles now.
Let me approach my first comment from a different angle...
I still think though that your guide, by just flat out saying you should never get your AC too high because of power turtleing, is not taking into account the differences in play styles of GMs. I have GM'd and played under different GMs enough to know that the GM you have (and the gameplay decisions he makes, both in style and in tactics) makes a bigger difference than any other single consideration at the table.
I play with two guys who, when either is GMing, see it as an adversarial position and will actually try to kill your character (problems there I realize). To further complicate things that group is mixed of optimizers and non-optimizers, making relying on the party to pull it's pull it's weight a gamble. I use this as just one example of when not having as high an ac as possible is a bad move.
My point is your guide pretty much says there are no circumstances in which a paladin should make an aegis build, due to the high AC, yet you give no strictly mechanical reasons why a low ac is superior. Instead you base your assessment solely on how a GM *may* act, presumably based either on your experiences, how you would act, or both. I'm not discounted your reasoning either. Yet there may be players for whom having the highest AC possible *is* the best choice, because their GMs don't act in accordance to the philosophy you lay out. I'm not saying that what you say doesn't make sense, I'm just saying not every GM is going to be like that, and that can make what is *optimal* a very different thing.
You don't make a lancer if the terrain in your GM's campaign won't be conducive to making repeated charge attacks (which is the case in many campaigns, though obviously small riders have it easier). How is that very necessary disclaimer different from what you say about the aegis paladin?
I realize you probably aren't going to yield the point, especially since your guide has not included an aegis paladin ever to my knowledge, but I wanted you understand that the advice you're offering may not be applicable to every player in every circumstance, not that it's bad advice.
I hope everything I said made sense.