WOW - more questions :(

[Dark_Angel]

I am on Nagrand as my realm. (it is a "normal" realm I believe).

Blackout works sometimes, and not at others... sometimes you can go thru a fight and it doesnt work, other times it works 3 times in a row lol.

It DOES help in PVP though at times.

 

[Squink]

Someone correct if I'm wrong but later on in the game on long fights mana regen is better than +spirit as it still regens mana in combat whereas spirit only starts again properly 5 seconds after you cast a spell .

That right ?

As with all things, a balance is needed. Priests can get a talent that allows 15% of spirit based mana regen while casting, and if specced holy they will get a % of their spirit as +damage/healing. So though you're right that spirit regen doesn't happen till 5 seconds after you stop casting, it's not always clear whether mana/5 or spirit is best. Certainly for levelling with Spirit Tap it's good to wand away at least the last 5 seconds of a mob so that your double spirit regen kicks in immediately it dies.

EDIT - try and get a shadow wand as well - it is affected by shadow weaving and this can have a significant effect when you get 5/5 shadow weaving (I'm getting wand crits past 700 on my level 70 priest and that's with only an ok blue wand)