Insight can feel like the true Epic Event of the Eternal Council. As a lot of the deck works around getting 5 boosts on Insight and having it online for a few turns so that Edia can melt down champions, gates and the enemy summoner if possible. Generally you should only play one Insight per game as boosting it up requires effort and you only can create one big “Insight + expose Edia” moment per game. However, often it is fine to just play an Insight to get +3 strength or even only +2 on some occasions.
Once Insight is fully boosted, don’t be afraid to use it to melt down gates. That is a big part of Edia’s threat.