Now that you have a DoM/DoW job at 50, you get a +50% exp bonus on leveling other DoM/DoWs. So that helps. With rested EXP and food, that goes to +103%.
The Daily Roulettes of Low Level and Guildhest give good once a day bonuses. Don't forget to use the Challenge Log to your benefit, those bonuses can give you some nice EXP for the week and a chunk of gil.
As for what to do at level 50, I am going to be lazy and reference you to what I wrote to a returning player
here. The one difference is that Myth is going away with 2.4, so you'll be picking up soldiery equipment instead. You'll also want to work on your relic weapon (or go for an Unidentified Allagan Tomestone to get an ilvl 100 one). That quest starts out in Mor Dhona, I think?
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