My group has been playing a swashbuckling campaign that plays out more like an episode of an adventure TV show than it does a dungeon crawl. As such my characters are involved in a handful of encounters per adventure and they enjoy frequent rests, so while my spellcasters always have spell slots to burn my Champion Fighter often finds herself with nothing more interesting to do than "I hit them with my cutlasses" every turn.
Rather than nerf my casters, I'm looking for any resources that might be able to provide my otherwise blunt instrument fighter with more that she can do.