I disagree here – the coolest fire creature is… do I need to explain why, or will you figure it out yourself?
Explain it to me, maybe I'll understand? :D
I know that the stats of earth creatures don't match their level, and the game sometimes puts level 3 earth creatures in random maps, but why? – I don't know. But why do you think they are weaker than fire creatures, when fire creatures aren't the strongest at their level either...?
As for water – I doubt you'd use this secondary skill at the beginning of the game, although overall, it's quite good... :)