4d4 x Vigor Modifier. Then add HP bonus. Short Rest =Vigor Mod x15. Long Rest Vigor Mod + Primary mod x20.
HP Bonus| Natural AR Bonus
LV 1 15 |+3
LV 2 10 |+1
LV 3 5 |+1
LV 4 5| |+1
LV 5 d8 |+1
lv 6 |+1
lv7 |+1
lv 8 |+1
LV 10 d8
LV 15 d8
LV 20 d8
LV 25 d8
LV 30 d8