So i always to take take on crucible before going in main game .
I usually left around level 20-21 because above it spoils my game pleasure.
I notice few thing maybe not very important but interessant to know.
Devotion goes 4 by 4 .
You need 3 points first , then , 5 then 10 , then 12.
Notice if you get out crucible to main game and clear some shrine it will automatically up on crucible.
For example you were no 5 points needed for devotion , it will be 10 .
Last thing to say , i also go out before leve 21 because all aether crystals won’t be available (dunno y though they just disappear when you try to pick them) you’ll have to wait until the cave near the blacksmith quest to get some.
I hope it will be usefull because there are many end game things but few beginning stuff