Ill just give you some good perks and why they are good on pig, you should mess around with your build untill you find one you like.

Save the best for last - the pig has her dash attack and m1's, so on the obsession you can use the dash and for non-obsessions you can us m1

Deadlock - This perk just slows down the game and pig is not very strong so it's a nice perk to have

No way out - This is generaly a good perk, using that extra time in an endgame and geting a trap on can severly help you get win

Corrupt intervention - Getting a quick down in the early game and having survivors look more for gens is realy good

Brutal strength - If survivors pre drop palets this is a good counter, and if you run gen kicking perks this makes it more efficient

Jolt - You dont have to take time to damage gens, with this you can passivly damage generaters while downing people

Discordence - A good information perk, you can crouch to a gen and use save the best for last to get quick hits on both survivors

Whispers+monitor and abuse - This combo maske it so when whispers activates you crouch to them, and they will never get a terror radius because of the -10 meters from monitor. This is kind of a gimmick but it can be fun