Lee So-young, Go Ui-jeong, Jeong Ho-young, Lee Seon-woo, Han Song-yi, Park Eun-jin, Yeum Hye-seon
That's already 7 and you can only protect 6.
I'm not sure I'm protecting Oh Ji-young before any of those. You could make a case for Han Song-yi, but she's really good in V-League, and there are still not enough spots to protect Oh Ji-young.
If I was KGC and just got Lee So-Young, I would have protected OH Ji-Young and instead let either KO Ui-Jeong or LEE Seon-Woo go unprotected.
Edit: Crazy as it might sound, I was thinking of not protecting Han Song-Yi and protecting KUJ and LSW.