What have MikeWill and Childish produced? Never heard of them.
El-P and BSBD is def up there though. The production BSBD have been giving Nacho and Skull & Bones and them have been consistently great..
And right now no one tops Sach Hill & Flatlander for me, I don't know how they share their production duties, but Death Grips' production is godly.
Album is sounding great so far. Alchemist is on fire, sounding like the haunted house version of roc marc.