Choose this route if you're working on Intermediate keys from +12 to +15. You'll begin to practice slightly larger pulls. You may also want to begin practicing a skip on the Curseforged Honor Guard pack on the way to Void Speaker Eirich, as this is key to a speedy strat in +16s and above - have a party member pull them away and Vanish/Shadowmeld or die while the group runs safely through the doorway.

Head down this route if you're looking to replicate the pulls that high-level keyrunners are doing.

Consider using this route if you are playing keys at +11 or below; higher groups typically opt to skip the mine cart pull in the Singing Forge wing, and instead pull the more southern group of Engine Speakers, sometimes even including them in Pull 18.