Yeah this one is definitely a step up in difficulty; one of my squads got wiped out from full health in a single round by the boss fight and another only avoided the same fate because of Habranthus' negate. Suffice to say I didn't get the victory.
I could maybe eke out a win if I used some rainbow coins and memory crystals on centies and high ampies to power up Dendrobium... but I think I'll instead run the final standard event stage along with the 60 stamina bonus stage whenever it pops up for event currency.