Earning More Blue Essence

For the past couple months I have enjoyed doing the missions when ever there was an event going on. But my concern is that I still am not earning enough Blue Essence for champions and mastery level ups. The thing is, I enjoy doing the missions so much and I feel like there should be more of them. A suggestion for League of Legends is to add like daily, weekly, or monthly missions that earn the players Blue Essence, keys, etc.. I understand the system is still new but I feel like this would be a great addition to the game.