I'm unsure if you've even bothered to read my post then. I've already explained that Flood is the reason DRK is not doing bad and is adequeately balanced with the other tanks. The other tanks with their "combo" do not match up to the Flood burst until *atleast* 8 GCDs in, in which everything is already dead and DRK is also regaining mana to, again blast out more 250/300 oGCD potency.
If you were talking about gameplay then maybe? Although I hardly see how 1-2 1-2 is any more engaging than 1a 1a 1a 1c 1e.
But as far as actual effectiveness goes, DRK does fine whilst levelling and is probably the best dungeon tank at 80. No TBN till 70? Rampart + Shadow Wall + Reprisal + Arms Length is more than enough.