[Coldsaturn]

Yeah! Also the grind to battle thing is not necessarily something you have to do for orbits. Sure, open orbits are fun and give you a bit of diamonds for each level, but they're a whale game after a certain point because they require a full set of ascended cards with maxed out protocores.
Individual orbits give you affinity, but those too at a certain point will stall because you need to build your cards and your protocores (and you only have 3 days a week to try 3 levels).

Veterans say that if you're not a battle girlie who slashes and dashes for the fun of it, then all your grinding should have the Senior Hunter Contest as main goal. That will be your main source of diamonds, and reaching 33/36 stars (at which point you get all the rewards) is what will allow a steady influx of diamonds at every reset.

I know that you're not even close to that yet (same), but it's a way to know where to pour your energies and why.