The north-south position is a really strong position in my opinion. Here is few attack from this position that I really like, and I hope you too
North south chock
This attack is really usefull if an oponent defend his arms
Kimoura from the north south position is also really interesting and effective technique
On the top, the kimoura allow you to setup a really nice inverted triangle.
The last, little bit more fancy allow you go in complete direction
What do you think about north-south position for grappling? Do you know other variation or other flow, let me know in the comment bellow