I am actually debating taking a unit or two of Razorwing flocks to help help castle up and be annoying.
I was actually thinking about doing 2x 10-12 flocks with a Ycarne for fearless and a 6+++. Then cast the 5++ power on a flock for a 5++, 6+++ if need be. It's a fair bit of points, but it gives you tons of wounds that are solid at board control.
There are two things that I love. Kicking ass and chewing bubble gum... And I'm allllll out of bubble gum!