I would have never dre amed of using melanoiden malt in an ipa, but floyd knows a hell of a lot more about it than I do. In terms of helping attenuate well, I would recommend a huge starter. I haven't run it by mr. Malty, but I'm guessing for a beer that size with no stir plate it will be around a gallon. Aerate as best you can and pitch at fermentation temp. When are you adding corn sugar? Late in the boil or to fermentor?
Thankfully, I have a stir plate. Would it make sense to make a bigger starter than recommended or am I looking for trouble? Mr. Malty has rarely if ever let me down.
I was thinking corn sugar at 15 min in the boil and any extra would be added to the primary. I would just boil it down in some water and cool it before adding.
I think I'll just have to mind my hydrometer readings more carefully. I tend to neglect them when I'm making smaller beers.