iOS: best practice for NSManagedObjectContext merge policy ?

[Florion COIFFÉ]

In your opinion, what should we use as a merge policy when setting up NSManagedObjectContext ?

• NSErrorMergePolicy
• NSMergeByPropertyStoreTrumpMergePolicy
• NSMergeByPropertyObjectTrumpMergePolicy

For example, Ensembles (https://github.com/drewmccormack/ensembles) uses the last one. I'm not sure I have all the informations about how Couchbase-lite works to make that decision.

Or maybe this is something useless with Couchbase ?

What do you think ? :)
Thanks!