I got the survival badge with warrior, cleric, mage and ranger. The most important thing, at least for me, was that the buffs that last until the end of the battle, last until a character dies. So, skills like "flickering flames" from the mage are quite useful.
Sadly, Pseudolonewolf rebooted the series in the "taming dreams" game. Which means that there probably won't be another mardek game.
I'd say he should still finish this series, even if it's a shorter game(or at least let someone else do it)
 "Rogue Fable III")
 "Super Stacker")
 "Hands of War 2")
 "Animation Throwdown")
 "It's Just TIC TAC TWO")
 "Hedgehog Launch 2")
 "Three Goblets")
 "Realm Grinder")
 "Unpuzzle 2")
 "Particles"){kind=icon}
 "Pixoji")
 "Monsters' Den: Book of Dread")
 "Save To Kill"){kind=icon}
 "Rogue Fable II")
 "Legend of Pandora")
 "Rullo")
 "Achilles")
 "Cube Escape: Case 23")
 "MARDEK RPG: Chapter 3")
 "Apocashop")