Work on hitting levels as soon as possible for lower levels is better imo, because there will be points where you want to level for awakening/strengthening/cultivating and the tasks don't give enough exp, etc.

At least try to hit the 70s, because there are stuff like summons, etc.

Just try to balance the two so you don't end up underpowered.

Unless you're like me and don't bother attending Sage World, where your power vs level is very important.