The Ixali daily turn-in is nice exp, as are the 5 other daily quests. They'll make for good exp from 50-60 once the expansion hits. Plus with the main story being a gate to Ishgard, it's worth finishing getting it done in case something nice is hidden behind them.

I had my mules still just after Ifrit when they released sealant, and got them up through Stone Vigil fairly quick. I was going to save the huge pile of quests for exp when they raise the level cap, but I'm just gonna spend some time the next couple weeks getting them caught up.