Okay, you need to take another look at the Batallion detachment at least.
Sure, you can send the Chosen to go claim enemy objectives but you've already got the CSM as well. You really don't need 5 objective sitting squads, especially as 3 of them that can't really DO anything other than sit on your own side of the board. At least see if you can find the points to hand them a Lascannon each or something?
On a related note, Sicarans and Rapiers will all be sitting back and shooting, being Night Lords won't actually help you much there.
Ask not the Eldar a question, for they will give you three answers; all of which are true and horrifying to know.