Are you using any software to help calculate stats like OG, ABV, IBUs, and color? Is this for a 5 gallon batch? When would you add the hops to the boil?
I generally like the approach of using a lighter color base malt (say a Golden or Pale Ale) and then using specialty grains to build up the colors. Sometimes it is hard to know what grains were used to make Dark and Amber extract. But using Dark and Amber is a valid approach.
For hops, you would probably be fine with adding 1 oz of Magnum at the start of the boil, then add 1 oz of either Cascade or Nugget towards the end of the boil (say with 10 minutes left).
I have no knowledge of Wlp4025, but a Belgian strain that looks to be targeted at making Trappist style beers seems like an odd choice. Well, unless you were aiming for a Belgian Stout.
I plugged the malt and grains into BeerSmith. For my setting targeting 5.5 gallons into the fermenter, I got 1.078 and 8.9% ABV. Is that the range you were aiming for?