also for sch I wouldn't change much other then using more healing to the fairy and have emergency tactics as a toogle like when not in use the sch shield the fairy pure heal when in use seraph is summoned changing all fairies ability into a less powerful version but shield and of crit grant both like the sch while the sch now become pure heals. while emergency is also toogle on sacred soil now give a shield instead of have Regen and whisper now give a shield the get stronger as it's in use. for last sch could get a skill that would have a cooldown of 3 minutes.
aetherical reversion. can target self or other party member turn all damage taken into a healing but turn all healing into a damage healing would cause double damage for a duration of 10 second.


for darknight it's simple I would give them a buff of 5% in defense and offence and a 10% in HP turning edge and flood into a HP use skills instead of mp tbn stay the same but a 10 second instead of a 6 abyssal drain stay the same but now esteem now still the target HP and when done the darknight get all the HP stole back and edge and flood would be a 10% HP drain on use.