All you have to do is power and vol +/- then flash back the stock recovery via fastboot.
Then wipe. Then boot in as normal (you will have to re-set up). If wipe does not restore you, grab 10.26.1.18 for your SKU from asus , rename the .zip inside to T4_SDUPATE, place on an microsd, pop it in, enter boot loader and enter RCK. Then it will flash it.
You should fastboot boot to ensure you are ok before permanent flashing, when putting a new recovery on.
Your bootloader must be on 10.26.1.18 to use anything on DB.