After leaving Myrna's group behind, Jake looked for a mission where his melee skills would be challenged. He found one where he had to fight giants invading a world of harpies… the harpies he knew were unbelievably violent, but those were pretty chill and even used weapons. Still, Jake had nothing to do with them, so he just focused on fighting the giants.
At first, he had a hard time winning without using his innate skills, but he had enough time to adapt since they worked alone. Since then, ten days had passed, and Jake only managed to rest between battles in the last five days. So, he took naps for thirty or so seconds…