That looks great. I have been thinking about doing something like this with hibiscus.
In my plan I split my batch up a few different ways, and add stuff like hibiscus and different fruits post boil. I am getting a little hung up on the hibiscus, though. I suppose I could just make a strong tea and add it post-boil.
If you plan on splitting the wort into separate beers then yes, make the tea and add it.