Above the mortal world, there are countless Daos, and what is called the Heavenly and Ten Thousand Paths is merely a general term; in fact, there are only more, not fewer.
For convenience of description, the Heavenly and Ten Thousand Paths is merely a simplistic term, but if one were to ask which Dao is the strongest, the Time-Space Dao would certainly qualify as one of them.
From ancient times to the present, space has been king, and time has been held in reverence, sufficiently proving the importance of their respective Daos.
Especially the Time Dao, which has always been shrouded in mystery and profoundness, even involving causal fate, a type of causality that even the Supreme Great Powers who reign over the Heavenly and Myriad Realms dare not meddle with casually, for it could easily lead to their demise.