So at first glance, you're still in the habit of thinking that 4 of certain cards is a good idea. Unfortunately that creatues redundancy in lthe ate game. Late game, those mana dorks really have no board presence. You also only have 4 creatures that have any kind of board pressence. You should have more than 4 because you could easily go through a game and never see them. You also have only 17 creatures, which makes it even harder for you to have any sort of board presence. Also, only having 20 lands means you are totally dependent on the mana dorks, but as you've seen repeatedly, that is a weakness of the deck. I would start by taking out two Llanowar Elves and a Elfhame Druid, and taking out the one Hissing Iguanar. I would put in another Dragonlair Spider and Thorn Elemental and look through the cards the decks came with for some midrange creatures, like 3/3 and 4/4 to replace Marwin/Hissing Iguanar (maybe even Ghitu Chronicler). Marwyn is really only good in an elf deck so I'd take her out. I'd use 23 lands, maybe 22 at the very least. Remove Fires of Yavimay, Warlord's Fury, 2 Shivan Fire, 2 Gift of Growth. Add one Overrun. Try to have 23 creatures, 23 lands, 14 noncreature/nonland (maybe 22 lands/15 noncreature/nonland).

What kind of mana curve is that? Sheesh! I'll look at this sometime soon and give you some feedback, most likely tomorrow.