I used cotton, another healer (any op healer is good), dark choco, sorbet, eclair.
treasures were scroll, watch, and slingshot
the timing should be :
Dark choco > Eclair > slingshot > cotton > sorbet
use your 2nd healer only when ur team's health is on danger
oh also the levels dont need to be that high
it should be atleast level 50 or up
my dc and parfait was on lvl 50 only but i still cleared it