You want to always flip Terra into Esper Terra, which is the main reason to use Terra as a commander
Efficient Construction is a valuable card, creating a 1/1 flying Thopter with each artifact you cast
Quintorius, Loremaster With Quintorius, Loremaster, you get to make spirit tokens just by exiling non-creature, non-land cards from your graveyardand then later, you can cast one of those exiled cards for free by sacrificing a spirit
For creatures, this was mostly okay because the undergrowth effects didn't tend to affect the size of the creature, so even on an empty graveyard, you still got the creature
You can follow him @robertliam21 on Bluesky.
Like I already said these arent exact numbers, but it should give you some guidance on what your deck needs