Just try it and see. It's not set in stone.
Maybe it will help now but won't help in 2 months time?
Maybe it won't help now but will in 3 months time?
Maybe it helps stop a night feed but leads to an early morning?
Maybe it makes no difference to night wakes?
Maybe it's adding a feed to a baby who doesn't need a night feed, but helps stop early mornings?
If sleep goes crap, give a dreamed a go for a week and see what happens. Maybe it helps, maybe it doesn't and you go back to how you were.
Maybe a dream feed gets you through a period of crappy sleep and is only needed for a couple of weeks.
What im saying is - the usefulness of a dreamfeed is fluid. At some times it will be helpful, at other times it won't. So the dream feed can come and go accordingly.