I don't know...He did a song or two on Keak The Sneak's HI-TEK CD, and he usually still produces at least one or two songs on Too Short's CDs, as well as mixing them (even the songs that he didn't produce sometimes say "mixed by Ant Banks"). If I remember correctly, someone left a post on BART maybe a year-and-a-half-ago saying that Banks is pretty expensive as a producer, so that could pose a problem...
But yeah, Banks turns nearly every track he touches to gold. I was listening to MC Ren's RUTHLESS 4 LIFE recently and was amazed at how dope Ren sounded over Banks' beats--Ren and Banks on paper sounded to me like an awkward combination, but that's not the case.
PEACE!