Hey,
some points that catched my eye: Even with Yarok, I don't think that
Acidic Slime is a good card. cmc 5 for a single target on sorcery speed is very bad for a removal. Unless it exiles, you usally aim for instants with cmc 1-2 like
Return to Nature or
Nature's Claim.
then,
Earthcraft seems a little lost in the deck, at least if I compare it's price to the other stuff you added.
As far as I've noticed you want to use
Arbor Elf/
Earthcraft + Intruder Alert +
Squirrel Nest for a endless amount of tokens. This sounds nice, but already requires 3 cards and still doesn't allow you to win, since you're lacking haste or a sacrifice option that allows you to finish in the same turn you generate the tokens.
Earthcraft +
Throne of the God-Pharaoh may do the job, but this already requires 4 specific cards. a infinite life gain with the tokens +
sanguine bond also seems possible, but this is again a 5 card combo.
the chance to draw 4 or even 5 specific cards until turn 10 is like 2% or even less (to be honest, its already late, and I'm to lazy to calculate it now). If you really want to win with your infinite amount of squirrels, you should really think about some tutors. The
Rune-Scarred Demon may do the job, but a single tutor won't change the chances that much, and hes at cmc 7, which makes him kinda hard to cast.
All in all, the land base is fine, but the rest of the deck seems, at least for me, like some squirrel cards thrown in and then filled up with sultai staples/goodstuff. I may be wrong at this point, but this is my personal feeling.
I can try to help you reworking the deck if you want my help after this kinda harsh critic. If you want it, tell me please which cards are important for you and what is the
game plan you imagined for this deck.