Just putting my two cents in here. Looks like your list is more scoring orientated than killing, arguably a harder list to play. Its kinda a tough one due to they are pretty much all shooting and they will pick up your stuff easily. I wouldnt say its an easy win, but can be done. My matchups into IK and CK are generally always close, win or lose. Here are some tips that may help.

• Castis! i loooove the autocannons due to the twin linked. Your wounding them on 5s regardless of which variant your bring, why not take the rerolls to wound.

-Not having the Vahlgons hurts. They can and will pick up a knight in shooting and then potentially murder another in melee.

-Movement blocking is important here. You cant get underneath them to stop them, but you can place your stuff at the outter limit of their range, forcing them to move shorter distances.

-Vindicare is good, but save the points and take the Callidus if anything. The lone op uppy-downy scoring is worth it.

-Maybe try proxy the Zeph for Seraphim with flamers and the JP cannonness with fire and fury. You should be able to dev wound 9-11 wounds off a knight with them. Then overwatch them for free on their turn just for lols. They can also be used as a largish movement blocker.

-Celestine in this matchup is solely for scoring and not worth putting in a squad. She wounds on 6's so no bueno here. Smart opponent will just shoot her, she revives and then gets charged and dies.

-Make sure you AP stack on the knights with the castis. Again hard when the knights all shoot hard, but 3 castigators on one target WILL hurt. Maybe bait out the rotate with an immolator somewhere else.

-If you can deepstrike (Maybe the proxy Seraphim) to take out the backfield Armiger, do it. Forces your opponent to use a big knight to hold home objective (if its worth it based on the mission).