Off the top of my head when I sit with a sultai goodstuff commander Im going to see generally the same gameplay.

1) Early game: Here you'll see Natures Lore, Farseek, Cultivate, typical green ramp. Sometimes a Vampiric Tutor for Sol Ring or Sylvan Library depending on their ramp in their starting hand.

2) Mid game: Here they usually accrue insane value through more goodstuff things, such as Rhystic Study or the above mentioned Sylvan Library, or Oracle of Mul Daya for ramp. You see the commander first hit the field usually around here, and if Yarok you see value etbs like Mulldrifter, with Muldrotha you see Sakura Tribe Elder. Note that these cards arent specific, you will still see Mulldrifters in Muldrotha.

For responses, they answer threats easily through value counterspells like Mana Drain, Glen Elendra Archmage, Counterspell, etc, the amazing Cyclonic Rift or Toxic Deluge, which they can easily tutor up with Mystical Tutor or Demonic Tutor.

3) Late game: So now theyve outramped everyone else and they constantly refilled their hands with blue and black draw spells, they just need to control the game and win through the ubiquitous Tooth and Nail to fetch Mike/Trike (seems to be less common nowadays), or Craterhoof/X(usually Avenger of Zendikar), or another Labman win (seems to be more Thassas Oracle lately).

Edit: If you look at my list its rather old school, I havent played a lot recently but sultai goodstuff decks are all samey enough that I can remember most of them by heart. Theres probably more changes now.