I have Jack o latern pet. What hero IS the best Choice to pair IT with?
Hurok or Adeline are imo the best choises and also in that order.
If you don't have them then Gremor, Alecia, Nilya, Serafine etc. etc.
The reason why I do not recommend Osiris, Sumiko or Sylphi is because equipping a jack on them interferes with the general timings in HoL.