He is decent on smokes.. maybe like top 5. Aim is good. On raze when he's flashy like jingg he's not that good but when he plays in his style (passive and aggressive when needed) he's good.
To be fair, you have to have a very high IQ to support Monyet on Raze. The tactics are extremely subtle, and without a solid grasp of theoretical physics most of the double satchels will seem overly complex or even stupid.