How can you do it without root and also same for the Friendship level other XP attributes.
I just installed in bluestacks 5 the signed version and is working just fine. I just play normally the gems cost zero is a wonderful setting to get energy for free its rare for me the have less then 20000 energy available to use anytime. And to get tons of books and pages anytime that special treasure event (that use lots of gems to buy all books/energy/etc). and though you can use gen to unlock the friendship events, after unlocking the library you can max your friendship to with everyone very fast, with the help of cost zero hack.
XP normally goes up faster by completing any kind of quest (main, side ones and quidditch), most other actions give xp as well but not as much.
to evolve your attributes don't rush on the main story quests, once you are second year stay there until you have done all (or almost all) of the second year side quests (except quidditch related ones), same next year and so one. I ended third year with all attributes at 29 wich is quite high for a normal third year, most players think that rushing over all years is good but that's not the best tactic.