Hi Lal,
You mentioned…
” Nibbana is detaching from this world. So, all three entities of citta, cetasika, and rupa cease to exist. There is no mind without citta and cetasika. So, when the mind becomes free of asavas, the mind itself cease to exist.”
From Paticca Samuppada point of view, there cannot be consciousness without namarupa and vice versa, right?