I think you have more cards that put multiple lands into play in a turn than you do draw. There has to be a disconnect there I think where you can't use all your extra drops because you aren't getting enough cards to hand to have the extra drops. Guardian Project gets you value from your dudes, Harmonize is just gas, and Beast Whisperer is another Guardian Project that proccs Guardian Project. Glimpse of Nature is good value here, too. Nobody ever walked away from a commander game thinging "Man, I almost had that, but I just drew too many cards and had too many options and too much gas."
I'd personally find a slot for all four, and probalby try to lower your curve in proccess. Maybe Boduka Gardener for Glimpse, maybe Guardian Project for Nissa Worldwaker, Wolfbriar Elemental for Beast Whisperer and Guardian Project for Mending? Just spitball there.
If you're having problems closing out games, Berserk probably makes Mutlani one-shot anyone, and Sylvan Awakening is a closer too.
41 lands is probalby more than is necessary. I'm at 39 in my Mina and Denn landfall deck and it isn't a problem if you're drawing enough.
Nature's Lore is slightly better than Rampant Growth. Both only get forests, but Lore gets it untapped. If it was a $30 dollar card it's probably not somethingto worry about, but it's like a buck, so it's an easy upgrade.
Ghost Town is a nice way to get free landfall triggers if you don't have lands in hand
Pir's Whim ramps, finds you a Nykthos or something and dings everyone else for a permanent. Maybe instead of Far Wanderings?
Maybe find a slot for Beast Within too? It solves soooo many problems