Divorce lawyers that have specialised in divorce law, as opposed to lawyers who perform the odd divorce from time to time, are an invaluable resource, as they can provide you with far more accurate advice on how to deal with your divorce based on their expertise and their experience of previous divorces and similar situations.
Divorce lawyers have vast knowledge of the decisions which Judges are more likely to make on any particular issue in the divorce, and how certain actions tend to be viewed by the Courts.
Divorce lawyers know what Judges are looking for and what types of documentation or evidence will be important to a favourable outcome for you.