I'd leave out the amber malt, and use only light extract and the .5 pound of crystal.
For hops I'd use the bittering hops at 60 minutes, and then use the wet cascade hops at 15 minutes, 5 minutes, and dryhop.
I'd go with 5 ounces at 15, 5 ounces at 5, and then remainder (if you only have 2 ounces left) at dryhopping.
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