Let me give some round hints 

 I'll put them in spoilers if you wanna be completely surprised but I don't think you'll be able to guess them
based on the hints. Just what to expect! 
hihi 
1. Easy to do, but difficult to do well.
2. Easy. All seasons of AHS should have this. Some criticize Freakshow for the lack of this.
3. Easy, common in Freak show 
4. Hard, yall are gonna hate me 
5. Pretty hard, Asylum was full of these.
6, Easy, is especially prevalent in Murder House and more recently "Chutes and Ladders"
7. Pretty easy. Very open ended round. There is a lot of this throughout all 5 seasons of AHS, and generally most horror films,
8. Hard, You're gonna hate me again
9. Easy. "Hotel" is full of these
10. Sort of Difficult. episode
3-8ish of Asylum deal with this
11. Pretty Hard. Freakshow had one of these in the episode "Orphans"
12. Medium difficulty. A common theme in Freakshow
13. Easy, basically just a finale