Top 3 (three) Law Firms In Nigeria Please

HI EVERYONE, MY SIS MADE EXCELLENT GRADES BOTH FROM THE UNI & THE LAW SCHOOL AND NEEDS TO KNOW THE 3 BEST LAW FIRMS IN NIGERIA SHE CAN WORK WITH.
                                     CRITERIA
1. REMUNERATION
2. WORK ENVIRONMENT
3. PROFIT SHARING IF ANY
4. CAREER PROGRESSION

WOULD APPRECIATE IT IF YOU CAN GIVE PRECISE FIGURES WHERE APPLICABLE.
THANK YOU.