Good luck trying to say any of those involved in the little chat room are wrong. We know they are wrong, we've proven they are wrong on multiple occasions, but they won't listen to anything anyone ever says or proves otherwise. Even with the use of their own tools they've been proven wrong. They have more straw men than Halloween!!
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What needs to be reiterated is that you only have two melee spots (MAX) in 10M.
Rank melee in taking into consideration DPS, Raid Utility, and Survivability given equal skill and gear.
My list would be something like:
Now, take the top two from your list. Is DK there? Nope. I guarantee you could re-think this list a thousand times and DK will never show up in 1, 2 or even 3 (when there are fights you can afford the liability of having 3 melee).
But just remember...everything is awesome!!