From the way that i read the talent calc, it says that it puts a debuff on the target that heals all party members for 15% of the shadow damage that you do. My idea for the group design would be a pally that is constantly being healed from all SPs and getting mana back form one of the priest with VT. I'd have no trouble stacking 4 VE on a target. Or if it's easy trash then maybe just 2 and have my disc/shadow priest off heal. I was going to have one of the SP go into disc enough to get the imp spirit so that all of my party gets the extra 6% of their spirit in spell damage. The way that i see it, it would be a great pve group. But as you guys also pointed out, they are not done with the what spell stacks/effects the raid.

I'll keep plugging away at leveling the priests after i get payed and upgrade the 3 trials. I'll also keep up the research at wotlk wiki site. If any of you guys find a post before me pls shoot me a PM. And thank you guys for the feed back. Wasn't thinking about the changes to party/raid spell effects stacking.