I was a Raimondian many years ago. Priorities are give to the following applicants:
1. brother or sister is current student
2. parent was Raimondian
For the rest, they put more emphasis on the quality of parents. Whether the parents are willing to spend time on their kids. They stress about family bonding.
I have met a parent whose kid is now in P2. Only the daddy and the kid attended the interview.
they would ask questions on how you "educate" or "take care" of your kids. So I believe they emphasize parent-teacher cooperation very much. Parent's active participation in interview is surely very important.
My friend went to interview withouth daddy and finally failed in the interview. But her son is very excellent in English. So don't know it is the reason or not.