Wow. Just... Wow. First of all, aran is only a good class above the 3rd job advancment, which I have. They're extremely slow and hard to lvl up. Demon slayers are faster, but are VERY hard to lvl up. It took me several months to get my demon slayer how it is today.
I've mentioned before that Arans use a combo system. You basically have to continously hit monsters till you get the right amount of hits in order to perform skills. The one you want is only a fair skill with needing a combo of only 50. The hardest part of Aran is the fact that you need to remember how skills are played because each one has a specific key combination, rather then needing to press a singular key. Frankly, I think it's somewhat boring due to the lack of available skills during normal combat. The highest skill requires a continuous hit count of 200!
It really depends on tour battle style. Personally, I'm able to master range and melee. If I were you, I would go for melee because melee classes usually have more health and you won't die easily. But really, it all depends on you.
I am more of a ranged user, but im trying to get to try warriors or other more melee oreanted characters time to spend a hour at the character crationg screen lol. Also do u like the name DreamSlasher?
Luminous is kind of boring because you're just sitting there using skills. Mercedes has even worse health and she requires a lot of movement in her skills. Mercedes are not recommended for noobs are restarters.