Yale Law Women has taken its latest look at law firms’ policies. Releasing its third annual survey on family-friendly firms, the student group cites the 10 best at helping lawyers strike a work-life balance. Some results were heartening. The group found, for example, that the firms are giving men an average of eight weeks of paternity leave. Other figures were more daunting, such as the finding that, even in the most family-friendly firms, women make up only 19 percent of partners.