Now that candy mage (Iberis) has a bloomed form I just need to wait for a deal that includes a 6* ticket so I can pick up Viola. With Viola, Burning Bush and Iberis I can set up a squad that gives someone like Alpinia or Kerria a decent chance of dealing +50% damage to all four standard pest types.

Speaking of Iberis, I verified that her ability that allows squad members to deal bonus damage to pests weak to hit-type attacks affects three squad members total even though the description says it affects two squad members total. I put Iberis, New Year's Ivy, Cherry, Snowdrop and Kerria in a squad together and all five dealt +50% damage to pests that were vulnerable to hit-type damage.