I've never been involved in annulment proceeding, but I have been involved in regular court proceedings, so let me suggest this:
If you REALLY want to obtain the RESULT that YOU want from this annulment proceeding, then YOU had better EDUCATE yourself about the Church laws and procedures regarding annulments. I've seen SO many people put their full faith and trust in advocates or attorneys (same thing, really) and end up SO upset when, after the results turn bad, they realize that their advocate or attorney really wasn't working hard on their case, or really wasn't an expert in the matter, or both.
So, use the best trained advocates that you can get. But take the time to read and study become your own expert on annulments. It's all on the Internet. Its not that hard to learn. Trust me. You can do it. I've seen many people will little or no education become more knowledgeable about the law and procedure of their particular case than the lawyer who was representing them.