At the very least, a daily banishing would be a good start.
I’d go with the LBRP because you’re bringing the Archangels into the mix by doing so.
You should probably do a “return to sender” spell (may need to do it more than once).
Keteriyas servitor Luna would be good as an active ward to keep things on lockdown outside of what you’re doing already, and there’s also Dremus the Devourer as an additional backup and ward.
I would also do JS Garret’s banishing and protection rite with Asaruludu
Throw everything and the kitchen sink at it. Something’s bound to stick.
First and foremost, you must act from a place of AUTHORITY and CONVICTION.
You are sovereign and mistress of your life and reality.
When you do the banishings and return to sender you need to pour your rage into it against what your banishing.
Also, you must state unequivocally and with power that whatever is fucking with you is not allowed to possess or harass you. That it will not be tolerated. That it must go. By your command, by your will.
Assert yourself. own your space. Express your righteous anger.
Words have power, and YOUR WORDS have power.