You have to prove that you have a good faith marriage. The supporting documents you listed here might or might not be sufficient to convince the USCIS adjudicator. For example, merely having a joint bank account/credit cards are not sufficient.
You have to apply for and receive Advance Parole. USCIS has stated that it will only grant Advance Parole for "humanitarian, education or work purposes." Also, it may or may not trigger the 3 and 10 year bar if you leave the U.S. I strongly recommend not to use the advanced parole to leave the United States without talking to an immigration attorney.
Although it is not easy, you have an option to remove the condition without your wife. You have to discuss an attorney in private. You also need to post your question in the family law forum regarding the child custody issue.