Purely casual :)
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Than 2 Viridian Emmisarys for chump blockers.
On another note, 4 llano war elves and 4 birds of paradise are not necessary. Just 4 birds of paradise, and upgrade your x 4 Rampant Growths to x2 Cultivates you'll do fine. This change gives you 2 more slots for useful spells, and 4 slots for creatures. (If approaching with the standard 20creatures, 18a/e/s/i, 22 land set up)
Well what purpose does Glissa really serve? Just a nice green/black creature? Yes she's three mana, but she's also legendary, meaning you can only control one at a time. Why not take her out for 4 Creakwood Leiges. Banors both green, and black, as well as passively spawns tokens. Liliana is not entirely necessary aswell as far as I see. She just seems to stand as an intimidating black planeswalker. Why not take her out for something that would be useful towards the idea of green/black token. One thing you could do is take Liliana, and ONE primeval titan out, and put in two Beastmaster Ascensions. Scion of the Wild would be another phenominal one for a green/black token deck, You're also very green based, why not try balancing it a bit? Put in some black spawns in like Moan of the Unhallowed. The swords are alright, but are not exactly awe inspiring in this deck as well, look into Deathrender or Scythe of the Wretched. Also, look into Fist Of Iron, green enchantment, spawns a token, and enchanted creature has trample.
This deck seems very prone to early game beat downs, burn or rush based decks. A problem I see is, a quarter of your deck has a mana curve of 6. That's pretty high. You also have no bridging between early game to late game. You may have a good amount of mana ramp to compensate, but that steals leaves you subject to being swarmed by 2/2s - 4/4s before you get your plainswalkers or big creatures out. I suggest finding a middle ground creature for this. You also have a good splash of token base in here. Wolf tokens, Zombie tokens, Wurm tokens etc. so might I suggest some form of trample, give those tokens a real threat to them aside swarming.
Unfortunately you are probably right there. But provided the spells that are in there, this deck is more than capable of a 3/4th turn win in several ways. You mentioned you saw a few problems. What would these be? I'm trying to improve the decks I design before I go out and by them, so critiques are highly appreciated.