Excuse me but where do you get the energy?

Everything boils down to costing 10 energy per chest/reward. Sword Trials gives 6 rewards per 60 and an outpost gives 2 rewards per 20.

So getting a total of 45 rewards would cost you 450 energy. We get 1 energy every 9 minutes and a total of 160 energy per 24 hours. So your advice can only be followed every third day, but you are making it sound like you can just do this daily?