For my TXV-equipped, R22, 14 SEER Goodman heat pump: superheat spec is 7 to 9 degrees, subcooling is 5 to 9 degrees. Not sure what it should be for your 410-A system.
Superheat and subcooling are determined using pressure/temperature charts.
Superheat = Suction line temperature - Saturated suction temperature.
Suibcooling = Saturated liquid temp - Liquid line temp.