I would definitely aim to get your lo into a consistent bedtime routine, it just makes things so much easier when your lo is older.
If you think that 7:00 is too early, you can always aim for 7:30 / 7:45, and then go in and do the DF at around 10:00pm. With regards to clusterfeeding, you can feed at 4, then offer another feed at 6 and then just top off before you put her to bed, this should enable her to tank up.
If you want to introduce a bath time routine, every other day sounds fine. But if you notice that your lo really enjoys her bath time, then you may want to consider introducing it every day.