This on an alt class? Fates or dungeons should speed you through quick, levequests are also very good. Fate zergs not really a big thing anymore on some servers but fates scale based on activity so several are quick to solo regardless.Where the hell does one level up from around 20 to 30. I keep reading different things but they're all extremely slow and I see barely anyone going around doing FATES. I've been level 25-26 forever now.
If it's not an alt class then things are going to be slow compared to what you see in guides because you aren't getting the massive 100% EXP armory bonus from having a higher level class already. Just follow MSQ line in that case, it takes you to all the relevant zones in a straight forward path with relevant side quests accompanying it.