Unscraped poop boards can be stinky. That's been a problem for some other people that have posted in the past. Changing to daily scraping seemed to take care of the problem for them. Try scraping your poop board daily, instead of letting it build up over several days.
For a run in a wet area, it's hard to beat a thick layer of sand. Just install boards around the outside edge to contain the sand, so it doesn't wash out, since it will be on top of concrete. If your run has a solid roof and stays dry, you can rake it to clean it. In a small run, you can even use those little sets made for dog clean-up, that have the little rake and pan. If it rains a lot, directly onto the sand, that may be enough to keep it clean, depending on how high a density of chickens you have in it and whether they're in there all day or free ranging.
With the DLM, you don't need the litter to be bone dry. Bone dry litter will be dustier and not compost at all. You just don't want it to be too wet. Wet litter is stinky. In an established deep litter coop, if you start to smell ammonia, you normally need to add more new wood shavings to it. I normally spread a light layer where it needs it most and the chickens even it out as they go about their business in the coop. This restores the carbon to nitrogen balance and improves the moisture content in a litter that's too wet. If it's a freshly cleaned coop and you decided to use the method where you add a lot more litter than you need at the beginning, then you need to stir, to bring up the clean dry shavings from the bottom. I don't do it that way, as it's more work and I like to have the clean shavings on the top layer, with the composting shavings down below.
If you read about compost piles for the garden, the wood shavings used for the litter are the dry, brown, carbon ingredient and the chicken poop is the wet, high nitrogen, green ingredient. In a garden compost pile, if it has too many brown ingredients or it's too dry, it doesn't compost. If it has too many greens or it's too wet, it's also stinky. The main difference between a garden compost pile and a chicken coop is that in a coop, most people are aiming for a cooler, slower compost process, rather than the really hot compost pile most gardeners are looking for. Although, I also often have a cool, slow compost pile in my garden, in addition to a hotter pile. Composting is about giving the microbes the food and moisture they need, as they process the ingredients into compost. When you manage compost so that the microbes are very active, they generate a lot of heat, so it's called a hot pile. When you manage it so that the microbes are less active and work at a slower pace, it's called a cool pile. Cool piles don't have the high heat that sterilizes weed seeds or viruses, but still eventually turns into lovely, useful compost.