Its not seraph is most useless, its that selene got deleted and with her it seems the code that made the fairy useful

Don't be fooled btw, Seraph is literally just Rouse but glitchy and Temperance is Divine seal with double the cooldown in return for a 10% mitigation. Neutral sect is also very much the same but replace 10% mitigation with the other sect. Come a months time, that's gonna be your only way of accessing nocturnal sect unfortunately since SE decided they are going to delete it for no reason. (They claim balance to make 2 regen and 2 shield healer, but that distinguishing factor doesnt exist as all the healers have elemnts of each sect. So they deleted noct for no good reason)