If you want to bot, use the level 50 nodes in the old ARR map.
50 Botanist in Southern Thanalan, Maiden Grass (nothing useful here, so may as well go straight for the highest level)
50 Miner in Northern Thanalan, Ogre Horn (or Cobalt Ore if you actually want something useful...but be careful about staying too long because this is where a lot of people Fate Farm)
And then set up your own skill profile so that it uses the skill to improve HQ chances for more XP.
But if you're willing to do it yourself, just do the new Heavensward Leves--but not just any leves, use the Evaluation ones (and no, don't use Temple, that's shitty XP).
Repetitive, but much faster than botting.
50 Botanist in Southern Thanalan, Maiden Grass (nothing useful here, so may as well go straight for the highest level)
50 Miner in Northern Thanalan, Ogre Horn (or Cobalt Ore if you actually want something useful...but be careful about staying too long because this is where a lot of people Fate Farm)
And then set up your own skill profile so that it uses the skill to improve HQ chances for more XP.
But if you're willing to do it yourself, just do the new Heavensward Leves--but not just any leves, use the Evaluation ones (and no, don't use Temple, that's shitty XP).
Repetitive, but much faster than botting.