I just cleaned out my supply of Munich Saturday. I went 50/50 Munich and Pilsen malt (6.5 lbs of each) with 4 or 5 oz of C 120. But I was going for a big hoppy amber. Kind of a hoppier version of Nugget Nectar. I landed a 55 lb sack of Avangard Munich for $40.
This being said, this isn't a standard IPA. If I use Munich in an IPA, it's 10-15% with medium crystal from 3-5%. I just kicked a keg of my all Zythos IPA. I experimented with mainly base malt. 66% two row, 33% Maris otter, and like 3.5 oz of C 120. I loved it. This might be my new go to bill for IPAs. All this balance talk in an IPA doesn't work for me. I brew mine so that they aren't balanced. I feel that a good AIPA should be more than skewed to the hops. I try to fit in a pound of hops in my IPAs. I seek much more of a balance in an APA.