The vanilla WoW Horde leveling guide you see on this site was originally made back in 2006 by Joana (AKA Mancow, or FuriousPaul). The guides have been tweaked many times over the years to make things "faster". The leveling guides were made because of all the messages I got from people asking me how I was able to level up so quickly on new realms. I was first to level 60 on 7 different realms (3 with Mancow and 4 with Joana), even winning Blizzard's "First to Level 50" contest they held back in 2006.
Mana per 5 seconds, AKA Mp5, adds direct mana regeneration that continues even while casting spells. Normally, this stat is very sought after, but while leveling, a priest should be relying on Spirit and Spirit Tap to regenerate mana, and should not be casting enough spells to fully reap the benefit of uninterrupted mana regeneration. This stat is also generally obtained at the cost of other stats, as not much leveling gear has Mp5 on it without also sacrificing other stats.
This part I very vividly remember - there I was, standing in Molten Core, in a raid group and without a guild, not knowing what was going on or what the hell just happened. I was pretty shocked at the time, but I was also insanely angry, so the shock had to take a back seat. As I was kicked I wasn't privvy to the guild chat happening at the time so it was pretty stressful - do I leave the group and just go on my way forever? In the end, it was another officer, Rogue and all around good guy Jihan that managed to calm things down and so I was invited back and we continued discussing the issue.
Swim Speed Potions (used especially at lvl 37 for Faldir's Cove in Arathi Highlands and lvl 57 in WPL). Try to get multiple stacks of these. I also recommend keeping a stack of these always in your bags. You will frequently pass rivers and lakes and can use these potions to pass them faster through out the guide. Please note that these potions do not stack with Druid's Aquatic Form and Glyph of Aquatic Form.
Starshards: On-use channeled ability that deals Arcane damage. 30 second cooldown. If uninterrupted, this spell has the highest single target damage per mana of any priest spell in the game. Also deals slightly more damage per second than Mind Flay outside of Shadow Form. In terms of mana-efficiency, this spell can only be beaten by channeling Mind Flay on a target with 5 stacks of Shadow Weaving, but getting Shadow Weaving to 5 stacks is a waste of mana except against Elites and players.
As I’ve mentioned many times in this guide so far, wands are one of, if not the most important part of a priest’s leveling. A good wand is going to significantly increase a priest’s leveling efficiency. In order to drive home the importance of a good wand, I’ve compiled a list of the best wands available for each level and where they are obtained. If possible, obtain these wands before they can be equipped, so time is not wasted using an inferior wand.
Touch of Weakness: On-use ability the applies a buff to the priest, reducing the damage of the next melee attacker for 2 minutes. Lasts 10 minutes. Decent for leveling when fighting mobs that hit very rapidly, such as dual wielders, or in PvP against similar targets, such as rogues or feral druids. Less useful against slower, hard hitting mobs or players.
As I mentioned in the beginning of the guide, people have this misconception about how one is supposed to level a priest. Many believe that in order to kill a mob, they have to use their all of their mana to continually cast spells. However, this is horribly inefficient, as doing so will burn through mana much too quickly, and despite killing mobs quickly, the priest is having to sit down to drink more often.
Quest helper addons like Questie are a must have and will make your leveling experience much smoother. Over the years, Blizzard has reworked WoW's questing interface to make it more user friendly and to present more information. In Classic, that was not the case. Quests were not readily displayed on the map, enemies did not have text to indicate you should kill them for a quest you had, and items did not have the glowing lines or sparkles around them to let you know that you should interact with them for a quest.