Obtain 11 000 points in the South China Sea mission in the Campaign
You should have little trouble earning the 11,000 assignment points and the 30 headshots for Blood wake in South China Sea. Utilize the same strategies as the first two missions (focus on headshots and multi-kills, avoid squad kills, etc.). Just make sure that you take your time when you reach the boat fight. Make sure you destroy all of the enemy boats to rack up as many points as possible. Between destroying the boats and achieving your headshot goal, you should be able to complete the assignment with ease.

You may encounter a quasi-glitch that will halt the mission progression and prevent you from reaching the Valkyrie. If this happens then you probably missed a boat. Use the weapon that allows you to lock in on a target and fire missiles. Look around and eventually the targeting system should pick up the missing boat(s).

Please see Above and beyond the call for point-scoring tips.