Read this again.
http://androidforums.com/index.php?posts/7009573
I'm trying to figure out why you need 5 times more help than anyone who has ever owned an f6. The only logical conclusion is that you don't read.
Pay attention because I'm not going to repeat myself.
1 Partition your SD card. Make 1st partition fat32 & 2nd partition ext4.
2 Download Carbon ROM, gapps for 4.4.x, supercharged kernel, and SD hack, and SuperSU zip.
3 Reboot into TWRP and wipe cache, dalvik-cache, system, and data. You do not need to wipe internal storage, SD card, or sd-ext.
4 Flash Carbon ROM, gapps, supercharged kernel, and SuperSU zip in that specific order.
5 Reboot system and do your setup. If you want to install Xposed then go ahead and do that too.
6 Reboot into TWRP and flash the SD hack. Flash the data on SD copy first then flash the data on SD install.
7 Reboot system again.
All done.