I wouldn't add sugar to a regular beer. It can thin and dry the beer out, even if you use it in small doses to avoid cidery flavors. Even if you add a whole pound of it (and I would NOT), you raise the ABV by only 1%. To me that is not worth it. I'd either go without that 1% boost, or use extract to boost it. The other thing that happens when you boost the ABV but don't change the hopping, you will have the unintended lower IBU rate (less bittering for the beer) so that the beer will be not just thinner and drier and possibly cidery- but less balanced with hops, too.
I'd make the beer as written, and see how it worked out, before I started tinkering with it. If you want a higher ABV brew next time, find a recipe with good balance and a ABV in the area you want.
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