Yeah Wizard Schools are great. Even when not upgraded you get 6 energy every 5 hours. The Ali might give you 50 or 100 but it's much more likely to give you 4 energy. Even if you can only collect from your wizard school twice a day that's triple the most common drop from the Ali. And the first upgrade (or two) for the wizard school won't be too far away so you'll soon be getting 7 or 8 energy each collection. (Upgrading to level 4 and 5 is tough, hence I'm still sitting at level 4 wizard schools).