Don't repeat my mistakes, don't take Dasha into this mode.
And I played with Darya for the entire Grand Prix... All matches were 4-1, only a couple of times it was 3-2. A decent choice, actually, I would say. With the aggro sword, the results were the same; I didn't run other decks because I didn't want to optimize, I hadn't touched it in ages, there were always some cards missing, and I don't even remember what I dusted. But these decks were ready-made and just lying there.
I made it to the final of Group A on the first day; today, I didn't even use a free run, and I didn't even log into the Showdown, I didn't have time... Overall, I got the impression that it's easier to play in Unlimited than in Rotation, but maybe it just seemed that way because I was using very interactive decks.