His tips are useless tbh.
No, they aren't.
It says stick to the high cover (the rocks) on the northwest side of the houses. That's exactly what I did. Basically, the rockets shoot around you, but you take no damage. Then, there is a lull in the firing, and you can move to the second cover. After that, a second barrage starts. After it's over, run towards the fence.
That's basically exactly what it tells you to do. Perhaps you read it too fast.