Fast XP 110-120, Temporary Event (Patreon)

Patreon RobotNinja sent me this message:  

Hey Archvaldor, don't know if you know this but leveling with Timewalking dungeons is insanely fast and can be done 110-120 in as little as 20 dungeons I have a pic of myself getting 463801 exp for just finishing the dungeon alone def. worth checking out especially with the 10% exp bonus pot from the service medal vendor.

I spent the morning experimenting with some of my characters in the 110-120 range and xp did seem to be very fast, for example getting 2/3 of a level in the Slave Pens from 117 to 118. Completing the bracket in 5 hours seems quite possible, probably less with a competent group. 

It should be added that in addition to the xp running the first dungeon of the day gives you 500 Timewalking Badges. These can be traded for items, which after a 2 hour trade window, can be sold to vendors for gold, which is quite a good method of generating raw gold in addition to the xp these dungeons offer . The current timwalking vendor however, Cupri in Shatrath, does not give particularly good value, it is best to hoard the badges for the Cataclysm or Warlords Of Draenor timewalking vendors.

EDIT: in subsequent timewalking events the xp seemed to be good but not broken due to a variety of factors.