Vol’Dun is the hardest and most tedious of the Horde Zones in Battle for Azeroth. It’s also probably the one that makes the most sense. Each sections of quests leads directly to the one you should do next. For all of these reasons it’s going to be best to get this one done early. Thanks to any legendary items you might have collected in Legion, you’ll be strongest in the leveling process before 115 and weaker after — because that’s when the legendary effects stop working.
Elemental: Lightning Lasso - Grips the target in lightning, stunning the target and dealing O2% of the target's maximum health in Nature damage over 5 sec. Can move while channeling. Enhancement: Ride the Lightning - If there are more than 2 enemies within 8 yards when you cast Stormstrike, you also cast a Chain Lightning on the target, dealing [ 50% of Spell Power ] Nature damage. Otherwise, you conjure bolts of lightning to up to 2 furthest enemies within 40 yards dealing [ 50% of Spell Power ] Nature damage. Restoration: Ancestral Gift - You become immune to Silence and Interrupt effects for 5 sec after using Spiritwalker's Grace. Warlock

Also note that power leveling is sometimes used to refer to paying someone else to level your character to cap as fast as possible (i.e. they power level for you); a distinction used by Blizzard is to refer to the paid leveling as "power leveling service." This behavior is against Blizzard's Terms of Service. Power leveling yourself, which this article covers, is perfectly acceptable.
Anyway I will go ahead & download the Twitch app like everyone's saying, but I still need to know whether my in-game addon settings will carry over automatically, or whether they'd return to default same as if they'd all been uninstalled in the curse client then reinstalled from scratch. Because if it's the latter then I will have to take screenshots of the settings on all my toons BEFORE I install the addons thru the Twitch client.
    WoW leveling boost includes not only pumping a character from from the start, it also includes other annoying timegates created by developers. For example, reputations: there are dozens of factions in Warcraft, and with each expansion they keep adding much more. Most of them are there just for the relevant loot, but some contain unique mounts or rewards you can’t get without attaining an exalted status with them. With our help, you won’t have to worry about grinding reputation anymore. Or there are professions - If you’ll buy WoW leveling you can forget about hunting for reagents to achieve the maximum skill for the handiwork: from the simplest gathering skills of Mining or Herbalism to the hardest crafting jobs such as Engineering and Jewelcrafting. And there are many more: just check out the Leveling category on our website – it’s all there!
Drustvar is far and away the hardest Alliance zone, which is exactly why you want to do it first. If you have legendary items, they’ll still be usable, and if you don’t, this zone will still be easier early on than it will be later. Drustvar is also extremely fast and will let you jump out ahead of your competition in other zones, which means fewer players around to take your quest objectives.