I disagree about Epatante. It was her second try over 2m4f at Punchestown, and she had no break in between. She went Cheltenham, Aintree, Punchestown, all at the top level, Marie's Rock went there on the back of a break from Cheltenham, as did Stormy Ireland.
I'd say Epatantes best form is at Cheltenham, and her Champion Hurdle form (albeit over 2m) is head and shoulders above what Marie's Rock has beat in her career so far. She's won and placed twice in Champion Hurdles. Her close form ties with Honeysuckle have her ahead of the other mares, IMO. I believe the Mares Hurdle last season was a weak enough race, and still believe if Telmesomethinggirl had not been brought down she would have likely won. You bring Epatante into the race and you have that class angle. Brandy Love could also be absolutely anything. Not forgetting Love Envoi, who I know you like too. Marie's Rock is vulnerable this season, if they all turn up.