Long time ago i've build my pet Nerokas for dps, if pet have physical atribute u can use Swift Atack and Frenzied Flurry, u will get 8 hits in 2 sec, u can also invest on prime pets to up the stars and use fruits to get S+/S/A+ atack or Crit.
Here u can se my pet hitting Roger with 1 skill (Frenzied Flurry) if Roger had any p dps resist reduction or def reduction, dmg was going to be higher.
But i agree adding new gears to pet will be good.