no, is not because magic damage suck on Cleric[cannot ignore high mdef on mobs = low damage on endgame mobs; could change, dev currently consider rod mastery for cleric, wait for mid/end July for KTOS news, they will balance cleric more].
You are slave to other people reduce mdef for you to deal gud damage.
Miko only gud for boosting other player magic attack (and clapping capella now)
omikuji unreliable, hamaya damage low, broom useless, gohei useless, clap only for diev statue and capela.
miko worst cleric aside priest, support niche.
if wants dps on cleric you need druid (attack-, crit rate- and crit dmg boost) and/or inquisitor (def ignore on dmg skills, wheel double hits of physikal attack skill used on it)
unless you want drag runecaster with you everywhere.
yes, for casual play exo/chaplain/miko is great, but at same time it doesnt matter when gear up, most mobs will die in 1 hit, even with smite…