Interestingly I've recently bricked 4 or 5 O2+ and none of the usual solutions allowed me to unbrick them. I bricked an Omega 2Pro using the same custom firmware build and was able to unbrick it using the factory reset process. However, the firmware that is installed is missing some critical files, including ap_client, wifisetup etc. The only way to recover the device is using a second device to replace the missing files.