My two cents to lvl up fast would be run your exp dailys - about 15 of them (easier with the new quest lists) and before you turn them in, open a 60% exp elixer which drops from silver elite runner chests (for running elite zones). Your exp of an avg 4-5k wll be 8-10k boosting your lvl up faster than any grinding I know of. Works all the way to lvl 61.

Darkshadowess Level 61 Rogue