I came up with a deck to quickly abuse Hunting Grounds. It doesn't address all of your issues, but if it goes off as quickly as I'd want it to, it might not matter. Of course, I'm missing some of the cards for this, but......
Land (24):
Wooded Foothills x4
Windswept Heath x4
Riftstone Portal x4
Mountain x6
Plains x4
Forest x2
Spells (16):
Tremble x4
Hunting Grounds x4
Book Burning x4
Browbeat x4
Creatures (20):
Ernham Djinn x4
Phantom Nishoba x4
Silver Serraph x4
Anurid Brushhopper x4
Krosan Groundshaker x4
You can tremble away a Riftstone Portal on turn two to smooth out your mana and disrupt their mana curve. If you got the right mana then Book Burning yourself on turn two for quick threshold, (or easy damage). They can only take so many Book Burnings and Browbeats before they have to start letting you get away with it, (Most people will just let you Book Burning anyway). Anyway, if you're lucky you'll get threshold on turn 2 or 3, and then drop the hunting grounds the turn after that, holding your hand of fatties. I included the Groundshakers because they can give themselves and your Brushhoppers trample, if you're needing it. Also, the Serraphs fly, if you need that sort of evasion. If you get out the hunting grounds early and they decide to just not play any spells then you can easily start dropping Brushhoppers and Djinns the old fashioned way to put pressure on them anyway. Also, Brushhoppers can help you get threshold if you need it, plus they can survive most removal.
Anyway, I know this is a different angle than what you were going for, but I thought I'd share my idea.