Testing

Jade Rabbit is an essential passive to Chang'e. It allows you to purchase items while in lane (although you do have to wait a bit for your rabbit to run back and forth). This allows you to sit lane all game and feed off of minions, granting you potentially higher levels and gold than other solo laners. You can also buy potions and wards while in lane, which is incredibly useful. This makes Chang'e one of the very few solo laners that can stay in lane with wards at all times.
b
Also, do note that each one of her abilities increases her mobility, so they are all excellent for both pursuit and escape.
b
b

Crescent Moon Dance is Chang'e's go-to ability. It does solid damage, has a wide arc, and has an extremely low cooldown. This will essentially replace your basic attack for most scenarios, and is the highest priority to upgrade first. (I would however avoid skipping Moonlit Waltz in order to get this to level 3 by the time you're level 5, as Moonlit Waltz is essential to avoiding being ganked once assassins have their ultimates). You can also extend the range of this ability by moving to the right as you cast it due to the way the ability moves from left to right. This is best for clearing waves quickly or extending your reach to hit multiple enemies.
b
b

Moonlit Waltz is an amazing ability that gives you mobility, along with immunity from all CC/damage for 1 second. It is essential to learn the timing for this ability, so you can escape even the most difficult of ganks. Despite this ability's usefulness, I would not prioritize upgrading it to higher levels, as the benefits are low compared to your other abilities.
b
b

Moonflower Dance is great in three ways. It heals you and your allies a decent amount, it deals damage in a large radius to anyone caught within it, and it reduces the healing of enemies. For damage, this is a great 1,2 with her Crescent Moon Dance. Moonflower Dance also increases her mobility like her other abilities, so it can be helpful for both escaping and pursuing enemies. Finally, this ability paired with Divine Ruin can really shut down enemy healers such as Ra, Hel and Chaac. Use it wisely!
b
b

Waxing Moon is the metaphorical whipped cream and cherry to top Chang'e's wonderful set of abilities. It offers impressive damage at long range, and a long stun (made longer depending on the number of enemies caught within it). This is an excellent setup for allies ganking your lane, stunning entire enemy teams in teamfights, or stunning assassins to avoid being ganked in lane. Always upgrade this when possible and NEVER WASTE THIS ABILITY. Unless you're definitely going to kill an enemy, save this ability so that you won't be ganked while this ability is on cooldown. If you do, you're practically invincible.
b
b