If you dedicate your pipes to specific tobacco styles, I'd definitely go "aromatic" with this one. Plumcake has only a tiny quantity of latakia in it. . . and some lists of its ingredients don't mention it at all. In addition, it's also sweetened and then flavored with rum; I personally wouldn't want that kind of blend in my latakia-dedicated pipes. But I could also see Plumcake working well right out of the gate in pipes dedicated to traditional Navy flakes -- that is, VA/burley flakes that include rum.
Of course, there's nothing wrong with smoking everything in the same pipe. Just keep in mind that it will take more bowls of any new blend before that blend's character really comes through.
Bob