CommentStreams:C3a1af0cd3f10ab1aa02d566187aeb60

Here is the rule of a thumb for a player with a relatively strong deck (who has unlocked 3-star Castle 27 for example) whether it's worth opening silver boxes to spin MA at level 5:

if you are below place 500 and you need less than 89k points to get above place 500 - Yes, do it.

if you are below place 250 and you need less than 333k points to get above place 250 - Yes, do it.

If you are below place 100 and you need less than 431k points to get above place 100 - Yes, do it.

Otherwise, no, you are good, don't spend any more.