Alright, there's a lot of different versions of mono Darkness, and this one is focussed on beating ai 3 almost everytime, and almost always with EM. Usually you can get EM simply by stalling longer and not letting your dragons out too early, but they can be essential in outrushing evil shields (dissapation shield, hope) to make sure you win.
I haven't got any stats yet, but they might follow later, anyway, here's the deck:
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7t4 7t4 7t4 7t4 7t4 7t5 7t5 7t6 7t6 7t6 7t6 7t6 7t6 7t8 7t9 7t9 7t9 7ta 7ta 7tb 7tc 7tc 7tc 7td 7td 7td 7td 7td 7um 7um 7um 7um 7um 8pt
It's 33 cards for a reason, I tried a lot of mono Darkness decks and these ratios best suited me.