From a master tactician, there isn't much to find in here. Nearly every skill is reactive instead of proactive, and for a Sch, it should be the other way around. This are my ideias on Sch skills after Main healing and support healing for o1s and o2s, along some ideais of what could make the class more unique and better without getting it overpowered.

#Fey Union - It would be great if it was not for the range, considering the boss size, the pet has to be as near as a melee character to cast it and it becomes a turret. If the player moves away the pet does not and the skill does not break, making the pet locked, I have to manually turn the skill off, so the pet can do something again.

Solution? For the duration the pet stops following me and follows the targeted player, make it imune to cleave damage and bang, it's looks way better and works way better. Becomes a great utility for mechanic heavy phases where players must rely on instant cast heals.