Is it out of the question for dh to go in there at one waking? Realistically, she could be down to 5/6 feeds now on a textbook EASY (7, 11, 3, 7,dreamfeed, night feed) and it sounds like she's getting about 8. If she nurses when you get home and again at bed, how about a dreamfeed, then try to settle between that and whenever you get up? I think two 5 oz feeds wouldn't be that far off from 2 nursing sessions at that age, and maybe the extra late afternoon and the df would give her enough calories?