Originally Posted by Volarmis

Well, since he supposedly spawns for you only when you maxed out your event store, you won't need any more currency.
You might not want to take part in the fights against those bosses if you still want the currency, true.
Although since he has a chance to drop equipment spirits, for me it would be a priority and would choose him over the earlier bosses to fight.

Wait, the ring okiteru (DMM name) have been implemented ?
If that is the fact then it is sure worth it, but Considering the pace and scope of updates I have a feeling this is not it.
Do you have a picture with a succesfull drop of this item ?