run 0/1s!!!

I'd run creatures that throw out the eldrazi spawn, like Kozilek's Predator and nest invader. They'll ramp your mana and creature count much faster than just the zones. I'd add another monument, and take out a Mycoloth or 2, they usually just get blown up the turn they're played, then you're out a ton of creatures. Maybe splash red for lightning bolt (for spot destruction), Hatcher and splinter twin. You won't need nearly as much land accel and you have, keep in mind that you can sac your spawn for mana. That is your greatest accel method. I'd keep the spasm, and maybe drop the Harrow count or get rid of them, but I doubt you'll need the Heart Expeditions. I get that they're for the gel-gen, but honestly, I'd consider taking that out too. You won't need the big tokens, as you'll usually drop the ascensions and swing with 7 creatures by turn 4 or 5. I run a deck like this, and that's pretty much how it runs. By turn 4 all my guys are indestructible fliers, by turn 5 they are all 6/7 indestructible fliers that are swinging for game. The type of deck works well in that the early tokens can ramp and, against fast decks, they can keep you from dying to aggro before you drop the monument, then your opponent better hope they have artifact or enchantment destruction in hand or they're done.