Luca Pataracchia

the instance lop allows you to use a path attributes to choose the path in the scene graph tree of you want to instance.

From the docs:
"Path Attribute

Use the value of a string attribute to select the prototype by path."

You could scatter points on a circle and ray those points onto your ocean evaluate. Then you could use an attribute promote to get the averaged normal. This is convenient because you can scale the circle up or down depending on how smooth you want it. Additionally you can smooth out you normal over time using chops

You might try increasing your max substeps on your flip solver. Having fast collision objects in a flip sim will sometimes result in volume loss. More substeps can help with this. In your case it could be because the water is moving quickly when it hits the collision object.