@Brothelmeister:
I appreciate your point that the DK+Rets has 4 healers and 5 dps... But I think you need to modify your statement to: "This team has 4 shitty healers and 4.5 good dps."

In their heyday DK+Rets was amazing for what it did--Which was not dominate arenas like Shaman do. They're great at destroying people in BG's. They do awesome in instances. Those things are all great. Do you know what they don't do well?

1. Any DPS once your DK is dead or properly CC'd. Once you lose that Deathgrip and that Chains of Ice it's ridiculously easy to force 4 Rets to have to use every GCD to cleanse themselves to stay mobile.

2. Any sort of ranged DPS. Sure, you can pop wings and Hammer of Wrath... Every few minutes.

3. Survive well to sustained DPS. You no longer have chain DS/DS to lower incoming damage.

4. Heal well. WoG from a Ret is just plain not good enough. There's no way for you to synchronize their DPS rotations so that they always have the same amount of Holy Power. That means that when you hit your WoG-->Paladin_01 key you really have no f'ing clue how much healing you're going to get. Do you know what happens after you hit that key? Most of your Paladins are now back to zero HP and just lost a TV.

Look, I've played DK+Rets since the day Kromtor posted on the forums that this was a team. I remember because my wife was throwing this stupid party at my house for her friends and I was drunk so I didn't have to talk to anyone. I remember sitting down at the keyboard and experiencing the (drunken) wonder of IWT spam with melee classes. It changed boxing for me--I have always gravitated towards melee classes and I dislike casters in general. I felt like a solid golden beam of love from Lord Jesus the Christ himself had parted the heavens and was pointed right at me while I spammed IWT on some dinky level 3 Paladins as they spun around their target. It was amazing. Transcendental.

What I haven't done since then is attach that sense of awe and amazingness to DK+Rets--I attached it to melee boxing. My point is this:

DK+Rets spend waaaay too much time worrying about being in range of their targets. Even though they can Cleanse themselves of movement effects and Freedom themselves... You still only have one DG and one person that can Snare. That means if the other side can control your DK, you have basically no closing tools. You will be kited endlessly. Forever. And while that's happening, you can't heal because you have no HP.

I've played both teams. All of my personal experience shows that DK+Rets is trash compared to 4 DK's. Just plain trash. I'm sorry to say it because of how much time and gold I've invested into my Rets, but it's the truth.