Default D802 KitKat update order

I Have D802 32GB SEA variant. It's rootet, TWRP, xposed modules ets.

I want to update to kitkat and I know I can't do OTA.

Do I have to:

1. get back to stock (KDZ) 4.2.2 and then ota to kitkat
2. Can I flash KDZ 4.2.2
3. Can I just use LG pc suite to install kitkat (even if I have custom recovery now)

In the end I'd like to have Kitkat rooted and with custom recovery. Which option is correct?