I've been on a selective Charmed binge lately (me choosing the episodes) and fuck me, when they honed in on the sister/sacrifice dynamic of it all, they really did it well. Even in Season 3, where clearly Shannen and Alyssa were no longer speaking, they were dynamic. Rose brought the same energy in her later seasons with Holly just always excelling at emotional work, especially in two of my many favourites 'A Paige from The Past' and 'The Day Magic Died'. It's forever a shame we never got to see what a Prue/Paige relationship would look like but I take gift in the real life dynamic that Shannen and Rose got to create.