-Quests give u exp and are the main objective of the game.
That was maybe true 10 years ago. Right now there is literally no quests, aside from the exalted series, and that predominantly gives you free items and skills. Not exp.
-I am not satisfied with your answer about blazing swap, since 3rst exalted quest can be done at lvl 103 in other zones. (not always as solo)
Party exp in this game kinda makes sense when you can exp at neutral zone. So 107+. Before that parties, unless of course you are a support, are terrible exp. Only possible exception is Coal Mines until 106 , IF you can set up a decent AOE party. Do not take this to mean that an AOE party in Coal Mines is better than Solo AOE in coal mines, it's just that most newbies lack the gear to solo aoe there, and not all classes can AOE
-Yeah I test now, in hellbound is more difficult, I couldn't left in auto hunt, but not in beleth. In Beleth is easier, is possible, and get items to craft and to continue quest.
This game starts after 110. Anything you do before 110 is irrelevant. If you are new and try to exp in Beleth exclusively at 103, pretty soon you will be out of soulshots and making nowhere near enough Adena to buy soulshots. Your goal, at this point, is to get 110 as fast and as cheaply as possible. So find the area that gives you maximum exp/hour, and forget about quest items and the 120 ether per day. Most people that have been here a while understand those areas until 105 are Blazing and War Torn. You 'll kill billions of mobs if you stick to this game, you 'll complete all your quests whether you want to or not. The general rule of thumb though, even at 115, is that the best exp is killing GREEN mobs.
Oh and forget crafting. Trust me. Everything you will buy with adena. Maybe if you 're bored and you have gathered a bazilion ether you can attempt to craft some weapons to enchant/sell, but crafting is NOT something you can rely on to progress