As elemental, Id want BoS for most trash clears and BoW for bosses. If I was enhance I would probably go with BoS all the way, if i was meleeing the whole time.

5 minute buffs are the way to go as everyone will require different blessings.

Paladin greater buffs are class based not group based remember, heavy use of 5min buffs is not likely in practice unless the paladin is a cheap a$$ and doesn't want so spend gold on reagents.

If it's a small group (5man or 10 man) you might only have 1 paladin, in practice everyone gets 15min salv, apart from tanks who get 5min kings or if there are no dps warriors in the small group 15min kings. The benefit of 30% less threat AKA the benefit of being able to dps 30% harder and not worry about your agro far outweights getting kings or might or wisdom.

For 25 man raids expect at 3 paladins, minimum.. also maximum. You never want less than 3 and you never really want more than 3 either. 3 paladins means 3 different blessings on every single person in the raid the whole time.

It's going to break down like this

Paladin #1: kings on every class
Paladin #2: wisdom on casters and might on melee
Paladin #3: salvation on every class and overwrites salv on tanks with light

What the OP is saying is that Enhan shaman and feral druids may want might instead of wisdom from paladin #2. whispercasting 5min for two people isn't much of a burden so I don't really see a problem with that tbh.

Why 2 people? I'm predicting 25 man raids won't want feral druids, basically they've recieved no serious improvement in the released tbc talents and spells, maybe 1 max and realistically only 1 enhanc dps shaman.

Raids are still going to need healers, a raid with all ret paladins, enchance shaman, feral druids and shadow priests ain't going to get far.

I think you've missed the point about offspec healers joining a raid.

Other than that, i'd agree with you on the buff aspects of a paladin.

In a 25 man end game raid I have this feeling you're still going to want 7-8 healing spec'd healers as I don't think off spec will cut it at an end game level. The difference between resto shaman/druids and holy priests/paladin vs off specs is pretty huge currently and it's only going to increase with some of the talents in the xpac imo.

I guess it's all relative do you want to min/max your raid for best results or just have an average raid.

Yeah just whisper cast its not the end of the world. And 25 man raids are a lot more practical than 40 mans single casting.

In a 40 i spent about 80 seconds out of 300 seconds buffing. Thats over 25% of the damn time spent casting buffs.

Onyxia was a particularly fun one, i would buff one side then run through to the other side and buff them. Using greater blessings provides an additional benefit with who is in range and los of my position without having to go chase people. Or in bad cases try to work out which pally is next to which group of people and reprioritise buffs. A real pain if you lose one pally in an encounter and still need to do a rebuff cycle.

As far as enhancement shaman i would be leaning towards might over wisdom though.

Salvation? I can't remember the last time shaman aggro was a problem. If you think you're going to pull aggro with your DPS, keep dreaming. Aside from a windfury in the first few seconds or earthshock you'd be hard pressed to pull it off an equally geared tank. If its a badly geared tank then hey, you should be tanking. If the fight gets to the point where healers are pulling aggro its nice when the mobs considerately move to the next highest armour target in the raid.

Blessings, like totems change depending on the fight so I don't think theorycrafting the third and fourth blessing we'll use in the expansion is very useful. However I can guarantee you that every shaman is going to want blessing of wisdom at all times. It can be quite difficult for shamans to get spirit regen ticks and we don't have a meditation talent like most other classes so mp5 is our best stat. Gaining too much mana when you combine the blessing and the judgement is a problem shamans are quite good at solving.