So by joining a dungeon party, you will have lesser down time, but of course grinding alone means you're in better financial state, because all drops belong to you, and chances of getting a common pet card is also higher. Also, you could duo with a kahuna till lvl 40 for their heals and buffs will make you an excellent fighter outfield.
rappelz-item.com/tag/level/">level 45-65 : Just go grind in the Lost Mines dungeon, stick to controller 1 till level 53, then controller 2 till 58, controller 3 till 63. And finally grind with a party in controller 4 till at least 65 before you move on to the Crystal Valley dungeon. Sad to say, but there really isnt any other alternative for us hunters, unless you would like to duo with a kahuna/cleric outfield, which i think will be definitely much slower.
level 65 onwards : You can start going to CV, but take note that it is a much harder place to reach and therefore your chances of dying on the way there is higher too, especially if you're on a laggy computer. Controller 1 till 72, controller 2 till 75+ and controller 4 when you're 78+. Notice how i missed out on controller 3. Well its because this dungeon seems to have screwed the order of mobs for controller 3 and 4, just go there and see for yourself.