Once again,what are you trying to accomplish?Are you cooking in a long horizontal offset stickburner that flows a great amount of air and you are trying to keep your product from drying out?
Yep,some type of sprayer may be helpful.
Are you in the comp business and trying to layer flavorings on a very small amount of product?Maybe.
I might also suggest keep it simple,cook one product at a time,make one change at a time,if that doesn't work,ask one question of us at a time.
Approach this as you might your commercial oven,cook lo and slo,add a minimal amount of wood.
Hope this helps a little.