Custom presets
 

Hi All, still learning but I have a unique question.
My main workflow is wedding, party and others, well I thank all that contributed to the presets. I have used the wedding preset for a party and I enjoyed the grainless outcome with this preset but my main problem is; since most of my audience are "people of color" with dark skin. My images turn to be DARK and especially when someone is not close to my light, the person looks dark to a point that you may not be able to see the face well if they have slightly darker completion. People with light skin, it looks beautiful.
So how do I tweak the preset to brighten my images a bit without overexposing them and still maintain the grainless image that I get with the wedding preset. Also can someone suggest another preset that will help in my application. I mostly work in the night and audience with dark skin