hand one...i know you were beat (because you said so), but i still shove the turn. i catch every boat worse than mine, and for half a stack i will also string along AK most likely.

hand two...fold pre. i dont like 3betting unless i KNOW he can fold hands that dominate me. which being short, i doubt he will.

hand three...thats what shortstacking is right there, imo. i would have 3bet bigger, but you got it in on a scary flop. ideally, he would fold to your flop slam. it will pay when you hit a flop.

but, thats where all the variance comes from shorting. you HAVE to push these for FE, and you get burned quite often when they have small overpairs.