Rocktail Is The Best Food For Pking But It depends On your level And Price range But If You Are Lower Level I Sugesst Sarks And Some Pizza For Lower Dammage.
Well If You Want To Make Money Whit Pking You Will Need To have 100%Ep So You Should Get the best armor you can and get the best items and stuff you can have and buy rocktails but if you are around level 70-80 you can count on mage pure mostly mage tankers and you wont stand a chanse unless you can like 2 hit him so be really careful.