Have all 3 guardians up and running, they can feed the shards, energy, coins and modes of light to the best \ strongest one, even a level 4 doing a public event will get a coin\mol, and because you can hand down weapons, sparrows, etc you will progress faster untill you get shards\ energy. All the random legendary gear keep, as soon as you hit 20 you can jump 3 \4 levels leaving the daily easy.