ways of leveling

[PirateCat]

If you haven't picked up the daily beast tribe quests, those would be good to start on and can be a decent source of exp to get you through the 47-49 quest gap. Between the sylph, kobold, sahagin, and Amalj'aa tribes, you can do up to 12 quests per day that way. You'll want to build reputation with those anyway if you intend to do the level 60 relic questline at some point since the higher tier quests give tokens that can be traded for things you'll need for that. (Also materia. Can't go wrong there.)

There are a couple of quest chains that start out of the Waking Sands at about that level which will take you out to a couple of other places (Gridania, Aleport area and Upper La Noscea as I recall) which I totally missed when taking my first job through that level range. Did you get those already?

But yeah, the daily leveling dungeon roulette is one of the best exp sources out there. You're leveling a tank, so you'll pretty much never have to wait around for a queue. And you get almost a full level's worth of exp from one of those. Hate to say it, but if running dungeons a bunch isn't something you can tolerate, you're going to be somewhat hampered for progression even in the endgame.