For me now broke gems for stamina is more usefull than roll salt mine LOL.
I lost about 400 gems this past month for nothing, so let's say it's strategic change.
Broke them for stamina to stock some coin and whale medal should be benefit than turn them to salt.

Looking into my squad, they're ok right now.
What I need more is dodging / defending unit to pass some broken map.
Without them I just like walk into graveyard.
And I think I can't find any of those unit easy, so I just have some fun farming moment for now.