I think there aren't "must haves" (maybe models that you take 80% of the time) but here my take on pandy brawler:
Kade now at 6 is fine (even if he works better in Woe is me), personally i don't like Teddy, i think there are better options. IMHO always take Pmagic rather than poltergeist, 3 sorrows are way too much, 1 is fine (if you want a sorrow at alla costs) and you already double the damage without losing too much versatility / toughness.
Models i use frequently: Insidious Madnesses, Lilitu, Dopple, Lust, Rider, Iggy. Sometimes: 1 Sorrow, Changelings, effigy, Kade, Wisp. Rarely: Coppelius, Barbaros, Emissary. I don't suggest to use Nekima in brawler pandy: you can't sustain both with stones.