Nostalrius Begins - Quality wow vanilla realm (1.12)

My leveling spec
http://db.vanillagaming.org/?talent#bVZZgMxzco
My raiding spec
http://db.vanillagaming.org/?talent#bxRhsV0oZrxxcc0Vx
please point out your suggestions and thoughts from your experiences about what spec is the most viable for leveling and what raiding, i have my 2 specs above which the 1st is the one im currently using and the 2nd one is the one im planning to use on raiding but i hear ppl saying to me disco isn't viable...

The entire front page of this forum is filled with topics discussing specs and levelling as a priest:

If the forum has some kind of display bug for you here are some helpful links:

Levelling:
About Priest Leveling
Priest Leveling Guide
Afraid of leveling a Priest? Check this thread!

Raiding Specs:
Best Holy Talent Spec