Which one of these combinations is appropriate for an open-lid, easy-to-care terrarium?
1. arrow-leaf plant, fittonia, wandering jew
2. arrow-leaf plant, wandering jew, pothos
3. polka dot plant, arrow-leaf, spider plant, pothos
4. purple passion, arrow-leaf plant, polka-dot plant, pothos
I live in 9a/10a zone, and I want to place my terrarium 3 feet from a west window.
I would avoid the Pothos and Spider Plants for a terrarium, since they have a hanging growth pattern.
The remaining plants you mention will work as small terrarium plants.
Here are some articles for you with more information.