After looking at both the Campania Arte Card or 365 Lite card for Naples and Campania, I think we will go with the 365 lite card for visiting Pompeii, Herculaneum, Paestum & MANN museum in Naples. Thoughts from people who've used either pass? Thanks!~
365 Lite card €27 ONE entry to each of the sites we want to see within a year. https://www.campaniartecard.it/365-lite/?lang=en#.
Campania Arte Card for €41 for 3 days, only good for 2 sights plus "up to 50% off" any additional sites, but also covers trains in Campania, which we don't mind paying.
I found a good comparison of the various options here. https://www.helenonherholidays.com/campania-artecard/#:~:text=The%20Campania%20Artecard%203%20days,with%20a%20365%20Lite%20Artecard.
Here's my original thread about our plans - https://community.ricksteves.com/travel-forum/italy/ideas-about-our-trip-to-pompeii-naples-paestum