The Ball unironically encourages your teammate to die during the Act 3 Bossfight(mainly in 2p)
If you dont know, if youre the only one alive when you play ball, it can't pass it to another player, so it goes back to your DRAW pile, making it basically bolas with 5 momentum enchantments(although it isnt placed on top)
Put corruption on that sucker(the receiver of the ball takes damage, not the player), and it scales FAST. unironically had 1 hp going into Test Subject(A10 second boss) so my goal was to play ball, then die
we lost cause bad draw on my teammate(didnt get Entrench, and they didnt kill Test Subject quick enough) but it woulda been a monster card to play
tldr Ball is better if youre alone. best card, can tell your friends they need to die to play optimally.