Use ftm mode by pushing power + volume down, then you need to flash a twrp recovery using your adb, with phone connected to you computer you can download a twrp image from Masterchief87 he has two zips with it inside them, copy the twrp recovery to sdcard with
adb push twrp recovery.img
Then use dd comand to overwrite your current recovery
dd if=/sdcard/recovery.img of=/dev/block/platform/msm_sdcc.1/by-name/recovery
Rename recovery to what ever your twrp is named, this should get to into twrp, once inside clear cache with twrp, if you still have a syste! You should be able to boot now, if not then flash the stock ROM that Mon has called butternoob, you should be able to boot up then