Free Shield of Faith

Kill Priestess Gut, take her to Glut in the Underdark and have him raise her as a spore servant. You can then use her to cast Shield of Faith on your entire party, as her version does not require concentration. Simply return to Glut after each long rest to refresh the buff.

Links

• See it in action here — “this trick gives 2 AC for your entire party”

Source

• “Tips, Tricks, Exploits & Gimmicks”, p. 56 — Party Build Template PDF