When should Asim use his flexible immunity?

I thought he could decide to use it anytime (like, even after nomination task lol) but I guess BB will ask him right before the nomination task every week. So he won't really know who he's going to be up against.

He knows he's popular, but does he know he's more/equally popular as Rashmi/Shukla/Sana? I doubt it. Also he probably thinks Paras is at his level too based on Paras's delusion which the show has enabled 😆

If I was him I'd be so nervous I'd probably use it asap lol.