Team I used:
Krystal: Cool Thief (MC) (Level 47)
Alissa: Stubborn Mage (Level 46)
Melissa: Cautious Cleric (Level 44)
Kyle: Laid-Back Warrior (Level 38) (Yes, the gap was big but I needed someone to replace my Level 43 Kind Pop Star who only uses Love Song, I hate you, Yume.)
Ft. Misty, Youngest Fab Fairy :)))
(Tip for anyone who wants to go through Tower of Dread: Go to the Traveller's Hub and accept a quest, more specifically a quest with a companion, then go to the Tower of Dread! you'll need that extra damage.)
TIP: Try to save all of your Sprinkles for the Dark Sun, it'll come in handy, in the meantime, abuse the Safe Spot, memorizing all the turns is also useful to figure out whether you need a Safe Spot, losing a turn or can hold on until the healer's turn.
There was a moment when everyone except my Warrior was dead, luckily my Warrior was smart and used Super Snap Out of It and revived the Cleric :D
After some Safe Spot abuse(TM) The Cleric revived everyone else and we were able to beat Dark Sun!