I didn't 5-box this, but I did roll 4-box shadow priests with my buddy as a protection pally up to 70. I have some vids that might shed some light on how this works. Armory link for my priest build: http://wowarmory.com/character-sheet...yon&n=Dondiego

Here's a couple movies of some stuff we did with that group.

http://files.filefront.com/Ghazan2av.../fileinfo.html
http://files.filefront.com/Hungarfen.../fileinfo.html

If you visit the link in my sig, I've got a bunch of 4-box vids of some of the stuff I did with just the shadow priests.


That aside, generally, you will be fine in shadow with VE+VT+SW:P+flay keeping the tank alive. In fact, I did not do SW:P in most fights because it sucks mana and just wasn't needed except for larger pulls or bosses. The only time you should have to shift out is when you are pulling bosses, really tough elites or large (4 or more) elite pulls. In those cases, I generally just stayed out of shadow and kept 4x renew up on him. With that plus the pally talent that returns mana to him on heals plus VT x4, he basically could hardly run out of mana in all but the most extreme/long fights.