Their recovery rate of 480 units of spiritual energy per hour is greater than the consumption of their divine form, which is 420 units of spiritual energy per hour.
So as long as they don't use any divine abilities in their divine beast form, they will be able to maintain the boost from their divine beast form indefinitely.
With this kind of recovery rate, not only will they be able to maintain their divine form indefinitely, but they will also be able to use their spiritual energy for the divine abilities in their pathway and the other three pathways for a very long time.
Of course, this is as long as their souls don't collapse under the strain. But even if their souls begin to fracture from the stress of maintaining their divine form state for long periods of time, they can just take energy water to recover to their peak state.
