At level 44, look for a Dzemael Darkhold farming group in the PF.
It will level you up hilariously fast.

With a decent group, you can clear it in ~3 minutes. That's 50k xp for 3 mins. (We had a DRG and an SMN for this one)
With a great group, you can clear it in ~2:40.

Use that from 44-50. Easily the most efficient method out there, much moreso than Aurum vale.