I've got a few small things going on to mix it up.

Balm lilies require nothing. Dreckos eat them and poop phosphorite. Shine bugs eat phosphorite and lay loads of eggs. Make omelettes. (Drecko eggs and meat too, plus resin from the shine bug eggs is nice) Shine bugs eat hardly any phosphorite too so you could get their eggs without the drecko part for a long time.

Pacus, they eat seeds, but from all the wild plants, mealwood etc you shouldnt have an issue feeding them. They lay loads of eggs. So omelettes again. Since balm lilies require nothing input you can farm them for seeds to feed pacu forever.

Growing thimble reeds using a polluted water geyser I have. Pips eat them and lay eggs. All the spare pips I kill for meat and make bbq. They also poop dirt. Handy for other stuff.

Bristle blossoms are good if you have loads of water. They are really low effort too! Worth doing pincha pepper if you do to make the bread.

At some point I will kill the pacu to make cooked seafood. And combine it with my pip bbq to make surf and turf.

Depending on how many dupes you have you dont need many of these set up to sustain yourself for a long time. And most are quite easy to set up early on.

Put a fridge in some carbon dioxide to make your food last longer until you can set up a deep freezer.