What Should My Pig Build Be?

Well, it's really a matter of what you feel like you need in order to comfortably play.

Her Survaillance is a very good perk. It synergizes well with Hag's Hex: Ruin, Clown's Pop Goes The Weasel and Demogorgon's Surge, so you might wanna get them in whichever order you want. Myers' Save the Best for Last is a very good perk on Pig too, including the fact that she has a special attack, which would prevent you from losing stacks and still successfully hitting the obsession. So these are 4 perks I would recommend you getting in the future and playing around with.

Still, including teachables which you mentioned... I would probably recommend trying out Billy's Enduring, Doctor's Monitor and Abuse and Bubba's BBQ (obviously). Enduring will help in chases, MaA will higher up your stealth efficiency, BBQ will give you double BP and info on survivors that are far away (which might be kinda hard with new auras, though). Basic perk Whispers might be useful too. To know where approximately survivors might be, also very useful in the Endgame, when only one survivor has left.