@ hplaner Works fine and we literally ran right through the mobs, using the 18 second potions. You can see my group using it in this run -
http://www.youtube.com/watch?v=vUj_YSxyVwg
To the OP, thank you for the videos. I just have Brewery, Scholo and Scarlet Monastery left and I will be checking out your guides in detail. Challenge Modes are definitely the best thing to happen to the game in a long time. I'm having a blast (of course it comes with a lot of frustration too!) I'm just a bit surprised you listed Scholomance as one of the easier dungeons. Our group assumed it was the hardest and saved it for the last.
As a healer, I'd like to add that it's extremely important to know all your mana saving tools in and out. I almost never drink during a run and I'm often in situations where I cannot use mana pots as I'd need to use an invis potion later. Healers should try to overheal as little as possible. Every cast counts.
Edit: Another thing I'd like to point out is that Combat / Self Rezzes can be extremely useful in certain situations. We had our Warlock soulstone himself and pull the trash pack before Taran Zhu in Shado-pan, clearing a path for the rest to run in and engage the boss. He resurrected and joined the fight almost immediately after. Once the boss went down, he ran back into that same trash pack with some cooldown (I forget the name) and could purify the last defender alone. He died after the CD ran out of course, but it didn't matter at that point. It's probably a good practice to take inventory of all spells available to your group before you start. Many hurdles can be solved with a little creativity.