I'll use neem lightly to knock down a gnat cloud or mist plant base but I dont like oils much. they kill everything and I count on large numbers of free range spiders to keep my garden clear of most pest outbreaks. Spider dont like neem oil, plants do I think. I never saw a marijuana pest that didnt die quickly when covered with ANY kind of oil, mineral, dlimonene, olive, canola, sesame, neem etc.
I dont know about mold or mites never had either in my awesome garden.
dont breathe neem or any other oil spray, and use some soap, like a drop of dr bronners peppermint soap or tween or the like to emulsify the oil in water.