DTK has given immense power to G/W and mono-red more than any other decks I've seen.
Pre-DTK I played strictly Mardu but the glorious shine Mardu once had is fading. So now I've split the ends and have made a B/W warrior and mono-red deck in response.
Not sure which I'm going to invest the most time in but as of now, the red deck here I have built has been quite successful in casual play.
Zurgo Bellstriker
is a bit prettier than he is actually good. He is also legendary so I cut him to 2.
Impact Tremors in combination with 4 Hordeling Outburst Dragon Fodder is stupid.
Magmatic Chasm
is still on the 50/50 list for me. But in theory mono-red is supposed to annihilate your enemy before they can get out their good stuff, right? A lot of decks have fliers and dragons so on turn 4 you play this and you basically can hit for quite a bit of damage.
Lightning Berserker is my favorite addition to the DTK red category. His option to dash for the same cost and firebreathing won me a couple games.
Dragon Whisperer
is also an okay addition. His formidable is almost never going to happen but his ability to fly definitely helps.
Thunderbreak Regent is expensive for an aggro deck, especially a red one, which is why I only put 2 in. But he's just too good to not have in here. By the time he's out, you have at least 2-5 other creatures on the field which allows for a game-ending situation. I might consider throwing another one in for the 3rd
Dragon Whisperer
but he's a bit expensive right now.
