Overall, Hume make the easiest equipped PLD out there because of kick ass RSE. Galka on the other hand, also make it very easy to equip PLD because we already have the HP and VIT so you only have to compensate MP and AGI. Elvaan are nice and if you like them, go for it. Galka/Elvaan are going to be the best in endgame where HP and VIT, and damage dealing (for exp) matter far more than MP.
Do what you love, and as Savara said, MNK to 18 is great way to get your subjob fast, you can solo while lfp and MNK don't require much starting cash. WAR/MNK is great way to level shield in prep for PLD to 37, and are actually the best tanks until that level. PLD to 60 can be pretty fast, 60-70 isn't that hard but 70-75 we really get passed up for NIN a lot. Hopefully the new updates to the job will change that but at the time being, just worry about getting the job unlocked.
Good Luck.