Your rule set just won't make sense with the Eldar Craftworlds (exodites sure, definitly even). Especially since the Eldars construction material Wraithbone, is grown, or rather sang to, and then grows [well the answers more involved].
Additionally holding planets, to the Craftworld Eldar would be suicide, they are monsters with tech and Physic Powers, but extremly fragile, Holding a position would be silly. The Biel-Tel craftworld has the most interactions with the Exodites, because it sees those worlds as the starting point of A New Eldar Empire, but the Craftworld Itself does not actually colonise etc.
The Planets can't actually offer them any additional production cababilities anyway. The Eldars Limiting factor is their Population, Production, foor etc is meaningless. Its actually this fact, that the Eldar could do so much that is attributed to their fall.
As such Eldar Craftworlds either need to be played with specific missions in mind [protect exodite worlds, also note that systems XYZ all hold Eldar WebWay Portals that must not be touched, destruction of all Mon-Keigh forces on these planets is required. lastly Planet System RTS hold Ancient Weapons capable of ripping the starts to shreds, please ensure that the lesser Mon-Keigh races do not get a hold of these.
Basically the [first] age of the eldar is over, and the second age looks like it might be off in the far distant future if at all [souls of dead eldar => Eldar Death God => kill/maim Slannesh, or thats the plan, of course they are creating a DEATH GOD so *Shrug*, slannesh wasn't exactly their best work either].
The Exodites themselves are an odd mix of High tech snazzyness and barbarnism. [the ride Dragons, DRAGONS! ITS AWESOME!].
I'd need to think a bit more on how to incorperate them however, Dawn Of war etc had the Eldar their for a very specific reason, and in Dark Crusade, if they take the planet, they leave a small number of warlocks there to basically manipulate all the natives so that they fight each other and are contained, and the majority bugger off.
[eek wrote a lot :|]