You obviously weren't paying any attention, even though you think or claim you are. If you were, the right thing would have been for you to have responded back in April when I asked you the questions I did. If you had followed up, I would have explained the risk of possibly not been able to complete the process and encouraged you to go back home and process CP with your wife. Right now, I think it's probably too late to change to CP.
Now, typically for FT as pertained to DV AOS, the process would have been for your to complete AOS first, following your approval, USCIS will then forward your case file to the U.S. Embassy in your home country and the embassy will arrange for your wife to be interviewed. The key note here is you, he PA must be approved first.
Now, there's the slight possibility of concurrently filing both the I-485 and I-824 like you've pointed out above. However, this will require you to pay the $402 filing fee for the I-824 (which wouldn't have been necessary if the PA's petition is approved before the FTJ process is initiated). Making the additional payment does not guarantee your wife will be interviewed and approved before Sept 30th, because you must still be interviewed and approved first before your wife gets her turn. Of course the I-825 fee is equally non refundable if the PA's petition is denied, the spouse simply wouldn't be scheduled for an interview.