I'm stubborn in one respect, while I'm more willing to min-max with 6*s than before I still want to stick with characters and designs I like.
Horse Chestnut reduces attack and gives a hefty bonus to attack (including an additional attack against bosses bonus when bloomed, perfect for Kerria.) Jersey has the attack and skill 1.2x boosts, which is why she gets on the team. I originally thought about going pure dodge but Pumpkin's abilities overlap too much with Saffron's. But Saffron evades and gives great boosts, Acacia gives solid crit bonuses and reduces attack, and Kerria's a beast like always.
I don't think enough of the 6*s I own actually offer the 1.2x skill boost. Though I'm tempted to consider sticking regular Victoria there once she's bloomed, which would give Kerria a 2x boost to skill chance whenever Victoria is attacked -- that sounds nasty.