Re: [IMPORTANT QUESTION]: Recommended Team Composition for Upcoming Boss Hunt
I've beaten this on every level and with a few different compositions but even on normal you need at least one sunflower and they should use the rainbow heal flower if possible. The regular healing flower is ok but the rainbow one spews the healing stars more often and it's vital to get constant heals to prevent the freezing from ruining your day. Definitely do not use the dark flower for this one!
Corn and Pea Shooters are great here as they can get on the roofs and have excellent vantage points to shoot the popsicles and they can avoid a lot of the freezing effects as well up there.
Stuffy and Vampire flowers are the best for sure. Stuffy's secondary effect from vanquishing zombies can heal and unfreeze allies and the vampire flower can heal herself although I don't think her life drain breaks freezing effects.
Torchwood has decent survivability and his flame breath attack can be handy vs. the groups of suicide yeti imps.
As posted above the sunflowers have a LOT of work to do and I ended up playing them a lot as I have all mine maxxed and have healed raids in MMOs before which is invaluable here as well.
Sometimes it's actually better to let a teammate fall and then rez them to full life instead of trying to heal them through nasty groups as a sunflower since you rez so quickly and they rez at full health! It sounds odd I know but sometimes it works out the best.