Hi,
i used the double installation explained in the guide "How to Install Hacked IPA as a Duplicate App & Keep the Original!" pinned in this section..... to do a energy quest used the hacked version (energy not decrease) until only one energy is missing, then switch to original version and finish the quest, so you can reduce the used energy. (not valid for 1 energy quest 1/1)
Keep also FB account connected and press reload when switching between two versions
I suggest also to do a friendship quest with hacked version to gain lots of gems, or win the cup at the end of the year and see the dumbledore speech with hacked version.....with all that gems you can buy energy in original version and stop to switch