R Shaman or R Druid

[Chivalrous]

Maybe that's why I don't feel like my Druid is weak, I have the Spellpower, spell haste, crit strike, and mastery buffs in group already. I know the buffs make a dif. Because when I run scenarios I can tell the difference in my DPS-so I'm sure heals would suffer greatly also.

[MiRai]

It appears Paladins also get Mastery too, via Blessing of Kings, and also get the stats modifier as well. For some reason I keep writing them off as a healer when I know they are amazing, frankly I just don't want to level one.

Then it is decided...

You should level five.

[Ellay]

haha good ol' Mirai

[heyaz]

Yes I forgot about the mastery buff from shaman which can be Huge for DKs in both pvp and pve. In full PVP gear you can push well over 40% mastery with the shaman's buff which is going to significantly affect howling blast, frost fever, and frost strike, but not obliterate. With the druid you get mark of the wild of course which will give them more strength, affecting all abilities by a small amount.

Resto shaman may have more difficulty surviving as your main healer but then again you have a lot peels with 4x death grips, asphyxiate, etc. But the shaman will need to be more stationary a lot of the time. Druids as I mentioned can move about and get out of tight situations themselves without as much peeling. Both, I think, have the capability of keeping all four alive in tight situations, resto shaman with ascendance, healing rain, healing tide totem, and especially spirit link. But I still feel like tree form has a slight advantage, and if you have a chance to go offensive you can contribute some CC to the group, which shaman don't have much of.

I'm talking specifically about PVP here though.

[Ellay]

I just did an Eye of the Storm with 4 DK's and a resto shaman, and while we lost the Shaman held his own and I think with gear will be in a good spot.
Checking recount healing stream totem does some massive overall healing for something you drop and forget about. I think this disillusioned my perception on why the Resto Druid did so well in PvP with 4x Enhancement... he had massive backup heals on top of 4 grounding totems every 25 seconds.

This is almost turning into a blog of sorts for me, maybe I should just write about it that way - I find it quite cathartic. The answer is here somewhere!

[heyaz]

I'm going to try both this week I think, resto druid then resto shaman. I've had mine at 90 almost since release so they are fully geared. My resto druid was definitely very gear dependent and he kinda sucked until I was 5 piece malevolent + weapons. On the other hand the shaman fully geared do some massive direct healing, and healing stream is a good one with 20k ticks + the glyph that reduces magic damage by 10% across the raid (or party maybe). Healing tide is a big one too, 40k and 80k crit with double that in ascendance. And I love windwalk totem getting my group out of snares from mages or whatever, it can also be used offensively to avoid incoming snares instead of anti-magic shell which is what I use when I'm running without a healer, but you still eventually get snared.

But, don't underestimate resto druids or write them off too quickly; although it's a bit different handling them while boxing, they put out amazing heals once gears - I top healing in nearly every BG, even outdoing most geared shaman. If I use tree form and nature's vigil every time it's up, it's not even close.

[Ualaa]

Druids can be Kitties! (and I suppose Bear-Bears...)
Shaman can be Puppies!

That makes them both amazing.

Since PvP gear has free PvP stats (PvP Power & PvP Defense), but is lower iLV than equivalent PvE gear...
You'll likely have a set of gear for PvE and a different set of gear for PvP.
It might overlap on some pieces, but in general there will be two sets.

Assuming two sets, you're not really that far behind when you use a Shaman for PvE and a Druid for PvP (or vice versa).
It is another option to consider.