My [overly] simple way of playing the game

[VarkingRunesong]

I don't understand why you had to grind XP. I was around 10 levels overleveled for main story quest. I had to start new job for Shadowbringer just not to lose XP from the quest line.
Just do your daily dungeon roulette and if it's not enough add 1-2 dungeons at your max. level.

I am brand new and the only time I had to do quests outside the normal MSQ was around the 45-48 area. I ran out of MSQ and only had access to one roulette that I could get. Other than that since 50 I have 100 MSQ to do plus I now have access to four roulettes. I am going to be over 60 by the time I get to the expansion stuff.