I feel Storm is slightly better than Earth.
Storm is a strong main class as a caster bcoz of the dmg and stuns from the thunder, the impaired aim from squall, the slow from the ice. Ok so im gonna try to define each of the first 8 classes in short But of course this is based on my personal opinion and my preferred game style i like so and advices and critiques are welcomed. Even tho you can mix everything and make it work somehow but i still feel that there are several OP dual class (Corsair, Conqueror, Oracle, Conjurer) while some are pretty hard to play (Illusionist). For me between these 8 classes there are some classes that are better than the other as the main class and theres only few classes that can synergize well with the better main class. The 4 caster are Storm, Earth, Spirit, Nature while the phys type are Warfare, Defense, Hunting, and Rogue. Caster type mainly focus on int and elemental damage while phys type mainly focus on str and dex build. The caster type and the physical dmg dealer type. When the game came out, it only have 8 classes. So i hope this could be a guide on Dragon Hunter but im typing on my phone now until my internet got back on again like in few days ahead.
I just found out about Ragnarok 2 weeks ago and start playing it like 2 days ago.