I think Massacre Wurm would also be really good in here too for token decks.

Beast Within in my opinion is a must for every green deck because it gets rid of any permanent in an emergency

Fertilid + Ob Nixilis, Unshackled is funny to pull off, while being good individually too as there are many tutors happening in edh.

No Smokestack? That's a good add.

Some things to consider are Dryad Arbor since you can sack it and bring it back with meren with 0 counters early. If you do run it consider Green Sun's Zenith. It also taps and sacks to evolutionary leap for a creature if you need it. Nothing huge just an option as well as going wide with craterhoof.

Green Warden Mursa seems weak to me that is a lot of mana to dump for that effect. I would look at Woodland Bellower seems like a much stronger ETB effect. As well as Massacre Wurm since you can cast him sack him then bring him back with meren and do -4/-4 and nuke any token players. Again this all depends on your meta just some ideas.

Farhaven Elf Searches for a swamp where wood elves just search for forest something to keep in mind. One other thing is Altar of Dementia. It is basically card draw in this deck and if you do end up running Lord of Extinction you can potentially set up a huge Jarad bomb or mill someone to death. If you get the Mikaeus infinite sack with puppeteer you can also mill the entire table. Just some interesting thoughts GL man.

why no phyrexian altar to go infinite?

I would personally add

mind slicer x1phyrexian altar x1survival o the fittest x1phyrexian tower x1zulaport cutthroat x1

i would take outjarad, golgari lichlord x1jarad's orders x1Mazirek, Kraul Death Priest x1puppeteer clique x1any land you see fit x1

this makes you a lower curve, and you get a combo.

What about Strionic Resonator? It's a cheap way of getting Meren's recursion twice per turn.

Question. Black Sun's Zenith is your only sweeper?