I've been an advocate of Ancients since I started playing Druid, but nobody seems to agree with me. Everyone is too scared of priests despite the fact that our control Druid decks directly counter them, Ancients or no Ancients.
I'm quickly finding that it's not worth running Ysera without an Ancient, Hogger seems to be working out better for me as of late. I'm also close to giving up on Rag without Ancients, people just aren't afraid of yeti's and azure drakes enough to use hard removal on them.
I think if you want to run Rag and Ysera, you should run twilight drakes and hope they don't have a silence in hand when you play them. 2x Twilight Drakes and an Ancient of War always freed up Rag and Ysera for me when I ran a more late game focused deck. I'm going to go back to my more late game focused Druid control deck and see how it matches up against the current evolving meta.