I thought I was pretty clear? No? Here's what I do, simple really ... you have to quest to level 10 to get into bg's then 15 for dungies. Archy starts at 20. Get the pet addon that shows all the dailies for all continents - do these every day and not on some other toon because you get xp for the battle AND the turn-in. Farm archy as you come up to those areas while going to your next pet daily. Always, ALWAYS be q'd for dungies - level 15-60 will come sooooooooo fast. Rinse and repeat. Archy has the biggest xp gain of anything in the game for time effort. This is all I do, no elixirs, rest etc. I am finishing my panda priest right now and have a total of just under 4 days play time on him - that is only playing a couple hours here and there for a week or so. You can do it padawan :) You can also do level appropriate pet battles in the wild for xp but it isn't as good as the dailies unless you're in a high level zone.
Love the addon, however I'm having a problem. Anytime I try to do specific actions (change my personal notes in guild window, use quest items [i.e.. using the shears from objective tracker to collect goat fur, or any other quest item used from objective tracker], etc.) I keep getting an error that the interface action was blocked by DugiUI. My only options are to cancel and not preform that function, or to disable and reload UI. Any suggestions? Thanks!
After completing your island expedition and second foothold, head back out to your third and final zone to quest in. Note that any legendaries you were using to level have become inactive and are merely stat sticks now. Feel free to replace them with quest gear as you obtain it. Before heading out, feel free to send your three champions out on new missions!
Footholds into enemy territories can be done as you grow in levels and should be completed before reaching Level 120. Take the time after completing your first zone to do your first foothold, or you can choose to complete one as soon as you gather your 100 War Resources which will prompt you to return to your mission table area where the first foothold quest can be obtained. Similar to how your initial zone selection was largely irrelevant, this selection is, as well. Simply pick one and complete it to earn your Mission Table second champion. Send your champions out on missions, recruit troops, and then head back out to quest in your second zone selection.
While leveling, try to make use of the new Battle of Azeroth experience gem, Insightful Rubellite, which gives you +5% experience. Equipping one of these requires a socket in your gear, so try to hold on to a piece of Legion gear with a socket or acquire one of the Legion Legendary rings since every class has one. Each of the rings includes a socket. You can acquire one of these rings rather easily by doing World Quests in Legion zones and acquiring 1,000 Wakening Essences that can be used to purchase a legendary ring in the Legion version of Dalaran.