Uff! To be honest, I think all have their own set of advantages and disadvantages. I initially liked the Death one better, it has lots of powerful cards and can be used in low and high mana battles. However, sometimes I got in troubles in very low mana battles, where I saw Water splinter users mastered their low mana cards. The same happened with the Fire splinter, so, I began to test waters with different Splinters and try to get used to their own set of cards.