Both? I have both skills. They both have advantages.
Bow
Pros
Great for grinding/farming because of the distance and attack rating. Often kill green monsters before they can hit you. Thus you save money on pots.
Also good for killing uniques cuz damage is good and you can stay away from a lot of the mobs that spawn.
Cons
Not that great in PvP. Slower attack speeds mean that nukers and other fast shot people can get ya quickly.
Blade
Pros
Great in PvP due to its tanking ability and chains. Not high damage, but if you're pure STR then you have lots of HP and good defense. Hard to kill.
Also good in farming, IMO, because there are some good distance attacks and chains, and if you have good gear, you can kill mobs before they get ya too.
Cons
Crap attack compared to int nukers, so you have to outlast them in PvP.
Not great for attacking higher lvl monsters and uniques because it will take forever, and you will go through pots like crazy.
Like I said, both have pros and cons. I'm going for an 80 Bicheon 80 Pacheon 80 Fire and 60 Light.
Of course, all of this will change a bit when the 90 cap comes out!

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