Brewing an Imperial Porter - Need Ideas for Second Runings

[Bad Goat Brewing]

I've used my second runnings to make a cooking beer before. I added a bunch of cane sugar, used almost no hops, and added garlic and paraded onions to it once it hit high krausen.

[Kbar]

Bump up the gravity a bit on the recipe, then use some Belgian sugar in the 2nd running's and WLP530.