I doubt that anyone would have any problems with the game, but still:
Here's my team composition at the end of the game (storyline)
Tristam - lvl24 Fighter
Kaeli - lvl24 Healer
Phoebe - lvl 24 Rogue
Reuben - lvl 24 Mage
To be honest it's an awful game. K, Nyan Cat is cute, so what? The game is easy, looks like crap and the nyan cat melody actually get's annoying after like 4k nyans.
Or I'm just having a bad day.
EASY GOLD FARM
Get M.Tyson, make him a fighter and equip Sweeper.
Go Mike's Revenge (1 or 2), spam 8 of them and heal them from times to times.
Repeat the process
????
profit!