Fastest leveling method from 80-100? Can my buddy run me through instances for exp or nah?

do quest bro. is faster

1-90 in 48 hours via Dungeon Finder. Tank/Healer get instant ques the majority of the time. DPS offspec or Main dps and offspec as a tank/healer to get faster ques.
90-100 12 hours give or take a couple either way. Run Draenor questline and gather the treasures along the way ( Flying in Draenor will make this faster for you ) As soon as you can que for dungeons here, do so while continuing to gather treasure/quest.

80-90 is dungeons via group finder

This post was edited by Cyba on Nov 24 2016 06:55pm

80-90 i'd do dungeons/quest while you wait for que. 90-100 is like 30 mins-1 hour per level its fast as fuck, thats questing