>>22368752A mixed set is one that combines both defensive and offensive sets into one. It's mostly a huge gamble though, so I wouldn't recommend it unless you're very sure you can make it work.
And doubles? Sure, I can do that.
- Quick Guard
- Spikes
The other two moves are based on what you want, either defensive or offensive. Spikes is a good entry hazard since it affects all foes, and Quick Guard is good in protecting your ally from priority moves.
