Swgoh farming flowchart

STOP HERE. If you had skipped any previous nodes due to difficulty, at this time you will want to double back and try those again. By this point, you should have a pretty solid fleet at your disposal, and should be fighting to get through all of chapter 5, and unlocking the skipped nodes. Those characters are required for key events like General Skywalker, and can't be ignored for any longer.

Once you've finished farming those earlier nodes, we can move on to TIE Advanced x1 found on 4-B.