I've looked into this quite a bit and here are a few bits of advice.
1. Use a Belgian Pale Ale Recipe you like and scale it down to get the OG you desire. Scaling down something like a Golden Strong would be too flimsy at table beer percentages (think Budwiser or Coors). If you're going for a Dark table beer, a scaled down Dubbel would be good. The flavors in most Dark Strongs may be too much for a beer that gravity and are basically Dubbels when taking out the dark syrup.
2. Decrease the base malt percentage at a higher rate than you do for the specialty malts. This leaves the specialty malts at a higher percentage than the original recipe. This will help with flavor retention when scaling down the OG/ABV. With less base malt, you will get less body & less flavor, but still retain what flavor you would be missing from the reduced base.
3. To boost the body to something more like you're used to mash at a higher temp, (i.e. mash at 157-158 vs 154). This will create more unfermentable sugars (i.e. long-chain dextrins) and make the beer have more body and mouthfeel.
4. If you want something that tastes like "beer" you'll want the ABV to be 2% or over. The flavor alcohol imparts in beer (and it is an important flavor contribution) is not noticeable below 2% ABV.