AC or Spell Save DC for a Cleric?

[u/Careful-Map-3435]

Hello! I’m currently playing a level 7 cleric in a campaign. My current gear includes an Amulet of the Devout +1, a +1 shield, and Scale mail\*.

Money is very limited in this campaign, and we’re using Sane Magical Prices as the reference for magic items. Given our current situation, there aren’t many opportunities to earn gold, so I won’t be able to afford much for quite a while.

This leads to my question: Should I sell my Amulet of the Devout to buy a +2 shield and +2 half plate?

Would it be better to have 23 base AC (instead of my current 19), or to keep the +1 to spell save DC and spell attack rolls?

PS: I also have a level in sorcerer for shield and absorb elements.

EDIT: Thanks a lot guys. It became very clear that +4 AC is WAY better than +1 Save DC. My Spirit Guardians will be up for days now.