The holovids are full of stories about mecha garrisons bravely battling dastardly pirate raiders. It's a pretty picture for the propaganda films, but its a long way from the truth of the pirate raids.
An explorer gone missing. A king in panic. A treasure to find.
Welcome to the Craggy Peaks. We hope you don't freeze to death.
That would mean we couldn't... play.
A town is besieged by a changing culture and is desperate to hold on to its oldways. But that gets harder as the next generation starts to leave the traditions behind. The drive of some people to resist change and hold on to what they have is so great that they will not only fightthe undead but eventually embrace them.
An elder cleric asks the PCs to transport a relic to a nearby city. A simple quest with endless possibilities.
Rather than making a baddy impossible to hit, consider giving it mega-hit points.
Super hard to hit leads to great player frustration. Allowing them to do damage leads to a sense of accomplishment. another variation of this would be to give the bad guy a forcefield that shows damage.You could also give them a mastermind ability that sluffs the damage of to minions who should be easy to kill.Once in a while a super high to hit encounter is ok ,but it should be few and far between.
Your mileage may vary