Best bonus weapon?

I’m doing my insanity run with infinite ammo and this is my first time trying the new weapons but they seem kind of underwhelming. I tried the carbine but the zombies hp on insanity is too high for that to be viable. Using the ghost grudge while Grace has the requiem but what’s the deal with the redemption? I put the sunglasses charm to boost its 1 round but what’s the best to pick between requiem, grudge, & redemption? I’ve got the rocket launcher already but gotta finish insanity to afford infinite ammo for that so I haven’t tested it yet.