Feral is a fun composition for leveling.
The Mangle damage has been increased in this patch, with the Bleed damage reduced; with five of the same class, that is probably a buff... most things are dead before we reach the 5x Rip portion of the rotation.

You basically kill things as a Cat, and Leader of the Pack is sufficient healing most of the time.
Since mana is not important for much, you can heal afterwards if you need topping up and then go back to Cat form to continue killing things without needing to wait for mana.
Leader of Pack will quickly restore your mana anyway, through crits while killing things.

Once you get flight form, any kind of a ground-spawn item that is collected becomes a joke in how easy it is to collect.
Fly over the item, two feet above the ground and you won't aggro a mob that stands five feet away, at least not most of the time.
Even if you do aggro, you'll frequently loot it without interruption and then press spacebar to reach safety.
I will frequently park the group sixty feet up and then break follow and do ground collections with one toon at a time.

The underwater quests are much easier with this composition too.
Cat Form to kill anything and instant cast Aquatic Form (definitely glyph aquatic form) for traveling underwater and bypassing the need to surface to breath.
Even in Hyjal with the 450% speed Seahorse, I did 75% of my travel as Aquatic Form... not needing to get out of combat, which can often take 5-6 seconds after a mob is dead on one toon out of the five...

Flight/Aquatic Forms really speed up questing dramatically.

I've gone with a Mangle, Rake, Mangle, Mangle, Rip rotation.
Shred is slightly better than Mangle, but Mangle doesn't care about positioning.
With four moves and then a finisher, you have better than a 95% chance of an instant cast nature spell on each toon, if you reach the Rip portion (a 20% chance per combo point, of an instant cast nature spell with any finishing move, and a high chance of two combo points from a crit on any of the four combo point building moves).
Primary choices for instant nature spells would be Healing Touch, Regrowth or Rebirth (battle rez).
The instant cast is more relevant for PvP than PvE play.

The composition has lost Berserk as a Fear Break/Immunity for 15 sec every 3 minutes. It has also lost the ability to break root effects via shifting.
This patch has reduced Rake/Rip bleed damage, increased mastery effectiveness on increasing bleeds and really increased Mangle and Shred damage.
I have not tested the changes for PvP yet, but have a feeling they will really suck; pretty sure Blizzard will patch something back in to compensate the class/spec, but that won't be for a couple of months.

Ravage x5, with Feral Pounce - Cat, is essentially an auto kill against anyone at similar gear levels. But you need a stationary target. A moving mounted target is impossible to hit with the skill, and even a running character will not be hit that often.




For PvE play, you might be better off with dual-specs.

Give your Bear all of the PvE talents, and a totally different set of glyphs.
Give one of your Druids a total resto spec.

You could try to run 3x DPS as Cats.
That has the advantage of one set of gear for both PvE and PvP play.

But then a lot of fights are much harder with melee toons, compared to ranged toons.
You could go with 3x Boomkin who never heal and don't need to drop forms.
If you don't take Sunfire, you can macro their rotation through Solar and Lunar eclipses.
That gets you one toon (tanking bear) in melee, a dedicated healer with all the tools and three ranged DPS with a lot of AoE power.

Your CC effects are Roots and Cyclone, which aren't as effective as Sheep/Banish/Shackle etc, but should do well enough.
Root will be great against any melee type mob.
You also have Hibernate against animals.
And a bear is a durable tank that is relatively easy to macro; probably not as easy as a Prot Paladin, but easier than a DK or Warrior with less procs/randomness to worry about.

The Cats/Boomkin can also give their Innervates to your healer, which could be infinite mana or close enough to that.
Boomkins can glyph Innervate to receive 50% of the effect when they Innervate someone else.

Take a look at the "Moo's" series of videos in the movie section.
They're a little older, but show Bear + Resto + 3x Boomkin in a ton of instances from the BC era, which will give you an idea of the composition for PvE runs.