Leveling is the least of your worries. After doing all that leveling, it takes 77 runs of CM/Praetorium to get that alt in full DL+relic to be able to raid anyways. Repeat the same boring easymode dungeons 77 times, that's the real grind in this game.

And I'm not saying 1-15 is a pain in the ass. What most do is wait till lv11 or lv12 and go straight to aleport.

1-10 is plain horrible, lv 7-10 is that gap where you can't do crap but grind mobs.