Clerics, Druids, and Rangers use Wisdom for spellcasting, and Monks use Wisdom for their AC calculations and Ki save DC.
For Clerics, Druids, and Rangers, their spell attack bonus is equal to: Wisdom modifier + proficiency bonus.
Their spell save DC is equal to: 8 + Wisdom modifier + proficiency bonus.
For Monks, their unarmored AC is equal to 10 + Dexterity modifier + Wisdom modifier
And their Ki save DC is equal to: 8 + Wisdom modifier + proficiency bonus
Matt Zane
Author, DnD Lounge
Matt Zane started DnD Lounge in 2021. Matt began playing DnD 5e in 2015, and has been DMing since 2017. He loves optimization, but also enjoys looking for creative ways to use spells and abilities that follow the spirit and letter of the rules. He also eschews pure optimization in favor of a more balanced approach, where building a character is primarily about serving an interesting story arc and party dynamics rather than maxing out DPR.