After one near-sleepless night, two ten hour leveling binges, and too many caffeinated beverages to count, Elamism's ascent to level 90 has successfully ended. You're going to be seeing a lot of words and phrases like "grueling" or "arduous" or "I had more fun passing a gallstone" going around the internet this week to describe the leveling process. From my experiences, I'd be inclined to agree...but I'd be wrong to.
The only reason this leveling was arduous was because a bunch of half-manic masochists with dreams of server first raid kills (a group I belong to myself) decided to try condensing a two-three week long leveling process into a 24-36 hour period. We skipped quest text, raged at NPC dialogue, wasting and spent entirely too much time ghost-running to our bodies because our sleep-deprived brains didn't realize the mountain under our feet had ended until it was too late to Parachute Cloak.
The one thing I did not rage at once in my 20.5 hour voyage to level 90 was my class. Shaman are a class that almost seem designed to rock at solo play. We have a strong utility toolbox, self-healing, and reasonable AOE ability. My leveling speed strongly depended on me maximizing smart usage of all of these abilities, as well as good decision making with my talents and glyphs.