Divine Guardian kérdés: érdemes, mert ez lesz az offtankolásunk eszköze. Offtankolásnál innét nyered a manát.

- The buff lasts for 15 seconds (I'm in the beta and just tested it).
- With 3 points in the talent, 10 people in a raid will get the buff every 8 seconds. In any instance or 10 man raid, this means that the whole party\raid will have a constant mana regen of 0.5% their total mana every sec through all fights.
- With a duration of 15 seconds, that's 7,5% of a player's total mana with every judge. But because you will judge every 8 seconds, it will really only replenish 4% per judge.
- All gear made for retris in WotLK is "warrgear", it's pure strength and crit rating, no int. At lvl71 I have about 4'000 base mana, so the buff will give about 20 mana per sec. It replenishes at half the rate of Blessing of Wisdom, and with 8 ticks per judge it will just barely recover the judge cost. 

Our new DPS cycle requires alot of mana. We now have the new DS, Consecration deals decent damage with the new AP scaling, Avenging Wrath has reduced cooldown and gives no debuff, and Hammer of Wrath is alot more effective than before. They will all be part of your standard DPS cycle in WotLK, and they all need mana.
However, we have an insane Seal of Wisdom! Seal of Wisdom now scales with AP, it returns alot more mana than before, it proccs very often, and nobody else in the raid can benefit from it.
When I kill tough mobs in the beta, I usually seal some DPS seal and fill all my mana before I go. I DPS untill I'm at about 30% mana, then seal Wisdom and continue. My mana fills up, and then if I need health I switch to SoL, otherwise switch back to DPS seal. 
Using SoW all the time is overkill and only reduces your DPS, but you will quickly realize how powerful SoW has become in WotLK.
Judgements of the Wise is a raid-support talent. You specc it if you raid, otherwise you specc something else.