Each specialization is simulated on a stationary boss for 180 seconds, with its family's raid buffs and the best gear known so far. This ranking only counts items that have already been datamined: many items are still undiscovered, so it can change.
Leveling routes from 1 to 300, required materials and costs, profession by profession.
Zones, dungeons, professions and the talent order of every specialization, to level from 1 to 60.
Which dungeon to run at your level, with the best item to look for there for your spec.
To set up your character.