I took my 110 dreanei hunter to 120 in about 24 hrs of play time with wm on and just doing quest chains.
So that wasn’t too bad. You can spam expeditions but it seems slower plus u wont have gear once you hit 120.
Also poster i think you shafted yourself outa the dwarf heritage armor. Unless you have already leveled a dwarf from 20 to 120. I think you are doomed.
You cant boost a toon to 110 then grind 10 levels. You have to grind all the levels yourself at least once to unlock heritage armor.