I would be much more concerened with getting the proper sweet/bitter balance in a wit than hop aroma or flavor. A sweet wit just does not sound very nice. I would stick with the 1 oz for bittering and pass on the later additions.
If you have anything else for bittering, you could use that and save your Hallertauer for later additions.
Beer is good for anything from hot dogs to heartache.
Drinking Frog Brewery, est. 1993