This one is pretty straight forward. You at least want one hone fliers on Hinoka. I also used three goads too. Honestly, if you use the basic gamepress sets you should be fine.
Strats:
Turn 1: Position Palla so she gets a hone boost and put her in range of the green mage. Just make a L with Spring Camilla being one space away from Palla and Hinoka being under Spring Camilla and Summer Corrin next to Hinoka
Turn 2:
Move Spring Camilla next to Palla and kill the lance unit. Then move Palla up to kill the green mage. Reposition Palla with Summer Corrin. Then Draw Back/Reposition Spring Camilla with Hinoka.
Turn 3:
Kill the sword unit with Hinoka by attacking from below him. Move Spring Camilla up and attack Ninian. Reposition Spring Camilla down with Palla. If Ninian is still alive kill her with Summer Corrin. If not just put her out of range of Hawkeye.
Turn 4:
Move Palla up one space and kill hawkeye. Then attackthe sword unit with Hinoka, but if she dies to the sword unit attack with Summer Corrin then attack with Hinoka. Honestly its one sword unit so you can do anything to kill him.

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