I really like the idea of using Gahiji to make lands lethal, This could be a very fun deck. My biggest suggestion would actually be to lose the token stuff and go straight for a ramp build, with board wide creature buffs like Beastmaster's Ascension and Overrun effects.

Thanks I really appreciate the advice. At first I had thought to go all ramp, but I found that cards like Life and Limb tend to bridge that kind of gap between the lands and tokens well. If nothing else, the Saprolings allow me to swarm the board very quickly. All the games I've played with this so far have ended with me using that enchantment and some combo of Overrun , Natural Affinity , Earth Surge and using my commander to buff them. I would like to find some more effects like Overrun though, what would you suggest?

So, the spendy good stuff first, Elesh Norn, Grand Cenobite , Craterhoof Behemoth , Mirari's Wake , Mirror Entity . These are some of the real powerhouses, especially if you play Elesh with Nature's Revolt to turn lands on, wiping your opponents board of lands permanently.

On the much more cost effective side of the world where most of us play, there's Gratuitous Violence , Savage Beating , Relentless Assault , Breath of Fury , Gruul War Chant , Titanic Ultimatum , Waves of Aggression (Which is nuts in this deck if you keep land in your hand) Shared Animosity , Spare from Evil , True Conviction , Baru, Fist of Krosa , Victory's Herald , Overwhelming Stampede , and Gaea's Anthem /Glorious Anthem . If you want to go way up the mana curve Strength of the Tajuru , Vitalizing Wind , and Decree of Savagery are all good options.

As far as other good stuff for the deck in general, Planar Birth , Abundance , Sacred Ground , and Rowen all seem good here.

I'm actually looking at building something close to this soon, and I will definitely credit you for the idea on here.