These are the rankings from the Опросы I have done on this club...

Singing Ranking link
1. Taeyeon
2. Jessica
3. Tiffany
4. Seohyun
5. Sunny
6. Sooyoung
7. Yuri
8. Yoona
9. Hyoyeon

Dancing Ranking (in progress)
link
1. Hyoyeon
2. Yuri
3. Sooyoung
4. Yoona
5. ?????

Acting Ranking (in progress)
link
1. Yoona
2. Sooyoung
3. ?????