plugging it into beersmith this gives an OG of 1.049. But that value is based off a whole mash and sparge from the grain bill, not the second runnings of what you gave me. I would imagine your second runnings would be at best half that. What abv are you shooting for? Doubling the DME would bump you up to 1.062. What are you shooting for in you hop profile? Half an ounce of cascade at 5.5% AA on a 60 min boil will give you about 17 IBU if you don't add more DME than what is in the profile you posted. Which should be pretty noticeable given how light the beer will be. If you did double the DME addition, you could expect 15 IBU.