so i managed to get the 40 waves second try. Cleric Mage Fighter Ranger was the group. Fighter ranger Melee with both Cleric and Mage and caster support. also just grab all the till endd of fight buffs since the entire endurece mode is one fight :D so my entire team had 25+ health regen +20 Speed +20% damage 100% poision resist 100% damage reflect + other bonuses (both front liners had health regen of 70+ with the cleric healing)
 "Wilt: Last Blossom"){kind=icon}
 "Monsters' Den: Book of Dread"){kind=icon}