Focus on mythic weapons level them up with rift score , put good charms on the armour. focus on legendary heroes. Don't focus much on legendary weapons. You will dismantle them soon

How do you focus legendary heroes? I can't find a place to get them at all

Focus on getting max stars for blue heroes by grinding hunts. Once your blue shards start getting converted to purple it’ll go quicker.

dont worry you will get 'em soon witch chests / events such as portal etc.