Went for all 55 gems, since I have more than enough gems to spare and it beats the plain 11 roll + plain 1 roll.
Got Sarcandra and Setaria (both new) as the guaranteed 5*s
Holy shit, got Viola from the 11 roll. She is literally the first 6* I've ever naturally rolled in this game, and I started when Calla's event first ran (that's over 2 years now).