Quests for 47+

[Rewyen]

Check the Waking Sands past Horizon. Around 47ish, quests appear there outside for dungeon unlocks and inside (which won't show up on the map since the Waking Sands is its own area, technically). Also, check out Bluefrog, Aleport and Mor Dhona as I remember a few scattered quests in those areas. Probably best to do what you need to do to reach 50 before taking on Garuda since the gap between main scenario missions is wide (as in Garuda is level 44 and the next main quest is something like 48 or 49) and it would probably be more of a benefit to have higher level gear synched down to 44 for that fight than level 35ish gear because if there is one thing i can say for certain, despite the ease of 1-40? Garuda will probably make you rip out your own teeth unless you have a freaking stellar dream team.

[Robobandit]

Check out western la noscea.. there are some lv 48 quests in that area near the sahagin base.

[CyrilLucifer]

Go to the Waking Sands, the room off to the side. You'll unlock 3 or 4 quest series there. Not enough to get you to 50, but it still a good chunk of EXP.

[Estellios]

Holy hell people it's Bluefog

Go to the Waking Sands, the room off to the side. You'll unlock 3 or 4 quest series there. Not enough to get you to 50, but it still a good chunk of EXP.

I think these also open up quest chains, too. I know the one for Southern Thanalan does.

Edit: oops you said series, my bad!