First off, It's looking really good!
Second, look at your screens versus your films. Are you spraying out every dot? If so, go back and double check your flesh tone seps. Looks like something is off (values in the head versus the body for balance) once the dots are printed.
Again, looks good! The colors you picked are great.
From a technical standpoint, the farther apart the colors are in value/contrast/color wheel (whatever it is really called) the more obvious the attempts at color blending will be. If you pick a gold color and a yellower red, the dots will visually blend together more. A strong red to a strong yellow blend will show discrepancies more readily.
Hope my ramblings make sense
Otherwise, I pick a flesh tone to put in