I don't know what you all are complaining about these are achievements you will get just from playing these classes as they are designed to be played. There is no grind here.
Gatherers who use there ability to gather will have to back back to these areas anyway because drops are location specific.
Crafter should be completing synth of all levels if they are actually making there parts and not just short cutting through the Markets.
Optimal synth for Speed/Difficulty/XP awards 500-600 xp.
3000 x 500 = 1,500,000 = Level 35-50