Selecting Rewards

When you complete activities such as lessons or tasks you often get a choice of rewards.

My first choice is to pick an attribute bonus, it doesn't really matter which one, just the one that gives the most.

Other than that, there are sometimes, gems, energy crystals or coins to select. Unless the coins are a great deal, like over a thousand, I generally would not bother selecting coins, as you build your coin stock up naturally in the game anyway.

Energy Crystal as well, if it is one or two, then generally a skill attribute would be a better selection,

Gems are the premium currency in the game and as such could always be a good choice to select if they are available for free.