Phoenix Cradle increases the duration of the Sol Invictus //BUFF// from 5 to 10 seconds. However, a sunspot which the player doesn't step into still lasts only 5 seconds. I think Phoenix Cradle should also increase the length of time during which a player-untouched sunspot stays active in the game world, also to 10 seconds. It would be a decent buff to the exotic both in PvP and PvE, allowing more time to burn enemies.