jank,
It looks like things are going great for you! You could try a cluster and do feeds at 7, 11, 3, 5, 7:30 to try to get some more calories into her before bed. Not sure how well that would work for you. You may just want to keep things the way they are. If she's gaining weight, producing diapers and happy, you may not need more feeds (5 feeds doesn't *seem* like enough, but I think my dd was on 5 feeds at 4 months.... 4 during the day and a df and she slept throught).
HTH