Decide before the fight
Your job depends on your hero, items, and the enemy threats. You may need to initiate, protect an ally, or wait for a key spell before committing.
Identify the threat
Name the enemy spell most likely to stop you. Plan how to avoid or survive it.
Play your range
Stay close enough to contribute without making yourself an easy target. Let the fight develop before spending every ability.
Practice
Review one fight and describe your intended job in a sentence. Compare that intention to what you actually did.