The virtue of making resistors out of ceramic is that they can run really hot.
AlN surface-mount resistors are good because they can conduct a lot of heat into PCB copper pours, or into aluminum heat sinks.
Either way, you need heat spreading and surface area to cool things.
One thing I like is punched copper disks, like jewelry makers use. Cheap on Amazon or Ebay. Epoxy one to a part and it spreads the heat laterally and increases surface area. Any air flow sweeps the top and the bottom.