Finishing challenges: prestige first?

I'm currently just trying to finish out off the challenges available pre-prestige, but am wondering if anyone out there has any experience doing this after prestiging, and whether it seems earier to do while going through the weapons-unlocking again.

You don't gain a real advantage after prestiging that would make challenges easier, so I don't think it would matter when you choose to do them (Aside from losing progress, but if you haven't gotten that far, it shouldn't matter).

Personally, I do the challenges after prestiging (if I even choose to), because unlocking the same weapons over again is boring to me and the challenges keep it fun.

I'm on 8th prestige at the moment, and here are some thoughts:

It's tough to lose all your weapons and perks (losing Ninja Pro is painful)! IMO it's always tough to get all your stuff back and finish off challenges after entering prestige, because you'll always think to yourself: "Hey, I've done this before! Why did it just said... Oh! That's because I've entered prestige..."

Having said that, there are certain challenges that are easy to get (they tend to be the ones that are available from the get-go) and some that are the complete opposite (such as dropping a crate to an enemy)! But, when you do prestige, at least you'll have some idea how to do those challenges.