I have Dungeon Master but some of the paths I only did once and don't know very well. I'll list each dungeon with paths from easiest to hardest with the exception of CM and HotW as I didn't do them enough to differentiate the paths. This is just from my memory and I'm sure some are debatable.
AC 3-1-2 TA up, forward/up, forward/forward SE 1-2-3 CoF 1-2-3 CoE 3-1-2 Arah 3-2-1-4
Fractals depend. Low level fractals are very easy. Level 48 (and above) is the hardest PvE in the game.
Feel free to add me and whisper if you see me on if you're on a US server. I dungeon every week night, usually run Arah, CoE, CoF or fractals.