Doing portal front end sometimes can be confusing.
But what we have learned that most of the time we need to properly package the EPA in order not to haywire it.
Ok straight to the point.

Normally we create (in sequences) the element / object
iview -> page -> workset -> Roles

So during the packaging
iviews and pages
It is best to put the iviews and pages together as we are directly changing it. We can deploy as much as we want.

Work Set n Roles
Each of them are to be package separately cause major changes are to be reflected in it.

Ps:/ this is my exp or should i say the level of understanding. Please do comment if i am wrong. And would glady change.. ^^