Originally Posted by
Rafflesiac
Wizard and Priest is a good CE for Servants like Medb, Carmilla, Passionlip, MHXA, and Kiara who value both healing and NP damage.
3000 Year Tree is only good for long-term healing teams, but it shines with those since it's one of the few CEs that allows Servants to hard-tank NPs like Twin Arm Big Crunch or Heaven's Hole.
Mikotto's a good CE because healing outside of Servants is rare and the amount of healing is very good despite being RNG. The only other healing CEs are either Liz's bond CE, Lunar Bath, or a 3-star CE that only heals for like 200 a turn at most.
Noisy Obsession has great utility on units like Marie and Euryale, and if you ignore the charm portion of the CE is a budget Gudao, making it useful for a variety of Servants.
Finally, Holy Night Reading is a budget Cute Orangette, and is thus great.