I use Hydrangea against anything I cant take out 1st turn. She is worth the extra coming from Bronze.
Japanese Anemone Queen is the native Rainbow I used my last medals on and shes great too, but the counter on Hydrangea a little bit nastier
I love them both.
For everyday first turn crit goodness, Nasturtium is your girl. Shes has good speed and is tough fighter with drain after the 1st turn.
I use her everyday.
and if you need a 30% crit rate girl, look at all the many options and flavors.
This new girl is just icing on the cake! basically with the way i will use her, I look at her as a 70% damage girl for the team.