New player - help picking a class/job

[Taika]

There isn't really much of "solo leveling" in this game, as the most effective way of leveling is doing dungeons (fastest exp, always in party) and FATEs (usually with others). The two jobs based on Arcanist: Summoner and Scholar are very strong solo jobs alongside White Mage. The current strongest DD jobs are Ninja, Monk, Dragoon and Black Mage. Good Bards are currently wanted in all endgame groups and can deal some very nice DPS numbers as well. Honestly, just try all the DD jobs that appeal to you and then pick your favourite.

Edit: Also, the job balances and endgame setups may very well change when the expansion is released in only two weeks.